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Resonance Frequency patents

      

This page is updated frequently with new Resonance Frequency-related patent applications.




 Power conversion system patent thumbnailPower conversion system
In a power conversion system, when a frequency of a ripple current, flowing into a power supply line of a direct current power source, is equal to a resonance frequency of an lc filter, a resonance is efficiently restricted. In the lc filter connected between the direct current power source and an inverter circuit, an n channel mosfet is arranged between a capacitor and ground.
Denso Corporation


 Double resonance vibration motor patent thumbnailDouble resonance vibration motor
A double resonance vibration motor includes a housing, vibration parts in the housing, a coil fixed in the housing, and elastic connectors to support elastically the vibration part. The vibration parts include a mass block, a first magnet group and a second magnet group installed in the mass block.
Aac Technologies Pte. Ltd.


 Battery balance circuit and battery apparatus thereof patent thumbnailBattery balance circuit and battery apparatus thereof
A battery balance circuit configured for a battery apparatus having two batteries coupled in series, can include: first and second capacitors respectively coupled to two terminals of the two batteries; first and second switching circuits respectively coupled to the two terminals of the two batteries, where the first and second switching circuits are configured to control charging or discharging of each of the two batteries; a third capacitor coupled between the first and second switching circuits, where the third capacitor is configured to store or release energy in order to balance battery levels between the two batteries; and parasitic inductors, where the third capacitor and the parasitic inductors are configured to resonate, and the first and second switching circuits are configured to operate at a resonance frequency.. .
Silergy Semiconductor Technology (hangzhou) Ltd


 Acoustic conversion device for active noise control patent thumbnailAcoustic conversion device for active noise control
An acoustic conversion device for an active noise control is provided. The acoustic conversion device can effectively suppress or remove noise by controlling variation in a lowest resonance frequency.
Pioneer Corporation


 Multiple-axis resonant accelerometers patent thumbnailMultiple-axis resonant accelerometers
Multiple-axis resonant accelerometers are based on detection of resonance frequency changes of one or more electrostatically-driven resonator masses due to electrostatic gap changes under acceleration. Specifically, one or more resonator masses are configured to resonate simultaneously in different directions associated with different axes of sensitivity (e.g., x, y, and/or z axes).
Analog Devices, Inc.


 Power transmission system patent thumbnailPower transmission system
A power transmission system transmits electric energy to a secondary resonator having a secondary resonator coil through an electromagnetic field of a predetermined frequency from a resonator having a resonator coil and reduces noise using two noise cancellation resonators with one predetermined frequency and its higher harmonic component set as noise reduction target frequency. The system includes, as two noise cancellation resonators, a first noise cancellation resonator including a first noise cancellation resonator coil and has a resonance frequency higher than the noise reduction target frequency by a first shift frequency determined according to a coupling degree between the resonator coil and first noise cancellation resonator coil and second noise cancellation resonator including a second noise cancellation resonator coil and has a resonance frequency lower than the noise reduction target frequency by a second shift frequency according to coupling degree between the resonator coil and second noise cancellation resonator coil..
Toyota Jidosha Kabushiki Kaisha


 Wireless power transmitter and  managing thereof patent thumbnailWireless power transmitter and managing thereof
A wireless power system including a power supply device configured to generate ac power; a transmitter configured to transmit the ac power generated by the power supply device; and a receiver configured to receive the ac power. The receiver includes a receiving unit to receive ac power through a resonance frequency band from the transmitter; a rectifying unit to rectify the received ac power to dc power; a dc-dc converter to convert the rectified dc power into a specific dc power required by a load; a voltage restricting unit disposed before the load; and a controller to detect a first rectified dc power, which is rectified from the received ac power, that is less than a predetermined threshold to prevent an instant overvoltage from being transferred to the load, to transmit, via a modulation unit through out-of-band communication at a specific frequency band other than the resonant frequency band, a signal to increase the ac power to be received from the transmitter and control the voltage restricting unit to allow the detected first rectified dc power to be transferred to the load in response to the detected first rectified dc power also being less than a charge quantity of the load, to detect a second rectified dc power, which is rectified from the received ac power, that is equal to or greater than the predetermined threshold to prevent the instant overvoltage from being transferred to the load, and to transmit, via the modulation unit, a signal to decrease the ac power to be received from the transmitter and control the voltage restricting unit to prevent the detected second rectified dc power from being transferred to the load in response to the detected second rectified dc power being equal to or greater than the predetermined threshold.
Lg Innotek Co., Ltd.


 Controlling the provision of power to one or more devices patent thumbnailControlling the provision of power to one or more devices
Systems and methods are described herein for provisioning power to a power consumption device in a depowered state (e.g., a device not consuming current such as standby current). Aspects discussed herein relate to controlling a detector, switches, and/or an outlet such as a smart outlet.
Comcast Cable Communications, Llc


 Aerosol mass sensor and sensing method patent thumbnailAerosol mass sensor and sensing method
A mass sensor for measuring particle mass within an aerosol uses resonance frequency detection to determine a mass of particles. A heating element is used for heating the resonant sensor element and it is controlled during a sensing cycle, with the change in mass of the deposited particles monitored during heating.
Koninklijke Philips N.v.


 Compensation circuit for acoustic resonators patent thumbnailCompensation circuit for acoustic resonators
In one embodiment, filter circuitry includes a series acoustic resonator between first and second nodes. A main series resonance is provided between the first node and the second node at a main resonance frequency through the series acoustic resonator.
Qorvo Us, Inc.


Metal-oxide-metal (mom) capacitor with reduced magnetic coupling to neighboring circuit and high series resonance frequency

Metal-oxide-metal (mom) type capacitors include a first terminal configured to receive a first voltage, the first terminal being formed on a first dielectric layer; a first set of fingers formed on the first dielectric layer, the first set of fingers being coupled to the first terminal via a conductive trace formed on a second dielectric layer; a second terminal configured to receive second voltage, the second terminal being formed on the first dielectric layer; and a second set of fingers formed on the first dielectric layer, the second set of fingers being coupled to the second terminal, wherein the fingers of the second set are interspersed with the fingers of the first set.. .
Qualcomm Incorporated

Device for generating electrical power from low frequency oscillations

An energy harvesting device for generating electrical power from low-frequency oscillations includes a high-frequency cantilever, a plurality of low-frequency cantilevers each configured to contact the high-frequency cantilever in response to environmental vibrations having a frequency within a near-resonance frequency range associated with said low-frequency cantilever, an a generator that produces electrical power in response to contact between at least one of the plurality of low-frequency cantilevers and the high-frequency cantilever. The energy harvesting device may also include an impact mass coupled to a free end of each of the plurality of low-frequency cantilevers.
The Curators Of The University Of Missouri

Power transmission device and wireless power transmission system including the same

Not a structure in which a resonance frequency of a power transmission device is set after a resonance frequency of a power receiving device is directly measured but a structure in which the resonance frequencies of the power receiving device and the power transmission device are estimated after reflection of an electromagnetic field for transmitting electric power to the power receiving device is monitored by the power transmission device is employed. After a capacitance value of a variable capacitor in a resonance coil of the power receiving device is once set to 0, an s11 parameter is detected while a frequency of an electromagnetic wave is changed, and the resonance frequency of the power transmission device is estimated on the basis of the s11 parameter..
Semiconductor Energy Laboratory Co., Ltd.

Wireless power transmitter and controlling resonance frequency using the same

A wireless power transmitter includes resonators electrically connected to each other and a resonance frequency varying unit configured to vary resonance frequencies of the resonators based on a change in an amount of power to be sent to a wireless power receiver from the wireless power transmitter.. .
Samsung Electro-mechanics Co., Ltd.

Radio frequency device with mechanisms for the adjustment of the impedances and frequencies of its antennas

A radio frequency device with mechanisms for adjustment of the impedances and frequencies of its antennas comprises a first circuit board, a radio frequency module and a second circuit board. The radio frequency module is disposed on the first circuit board that is disposed on the second circuit board.
Unictron Technologies Corp.

Antenna system

Described are an antenna system for wireless communication and a method of configuration thereof. The antenna system can include a first radiator having a first resonance frequency, a second radiator having a second resonance frequency different from the first resonance frequency, a first electromagnetic coupler associated with the first radiator and a first frontend, a second electromagnetic coupler associated with the second radiator and a second frontend, and a switch.
Intel Ip Corporation

Vibration-type actuator, driving vibration-type actuator, and electronic apparatus equipped with vibration-type actuator

A vibration-type actuator that is capable of reducing an unnecessary vibration during driving. A vibration body is configured by connecting an electro-mechanical energy conversion element and an elastic body.
Canon Kabushiki Kaisha

Technologies for temperature measurement of a processor

A method and device for temperature measurement of a processor is disclosed. A temperature-sensing circuit of the processor may have an associated resonance frequency, wherein the resonance frequency depends on a temperature of the temperature-sensing circuit.

Opto-mechanical physical sensor with an improved sensitivity

A physical sensor comprising a substrate (4), a movable mass (8), said mass (8) being able to be moved by an external force, a first optical resonator (16.1), a light wave guide (18.1) for measurement and a light wave guide for detection, a rigid plate (10) which are able to modify the optical resonance frequency of said optical resonator (16.1) by moving closer and away the same, a lever arm (6) rotatably hinged to the substrate (4) by a pivot connection (12) and the mass (8) being movably integral with the transmitting means (6), the rigid plate (10) being disposed relative to the mass (8) and to the pivot connection (12) such that the lever arm (6) transmits to the rigid plate (10), in an amplified manner, the displacement of the mass (8).. .
Commissariat A L'energie Atomique Et Aux Energies Alternatives

Mobile terminal and near field communication antenna

A mobile terminal and a nfc antenna are provided. The mobile terminal includes: a terminal body, including a rear surface defined with a rear longitudinal centerline and a rear transverse centerline; near field communication antenna, disposed on the rear surface of the terminal body; wherein at least one of the rear longitudinal centerline and the rear transverse centerline pass through the near field communication antenna, and the near field communication antenna is disposed asymmetrically to the at least one of the rear longitudinal centerline and the rear transverse centerline.
Byd Company Limited

System and adaptive aperture tunable antenna

An antenna's resonance frequency is detuned when a part of a human body approaches or contacts the antenna and consequently results in efficiency loss. The antenna may be tuned by changing its total load capacitance such that the antenna's total load capacitance falls within a reference capacitance range of a reference capacitance, where the antenna can operate at or near its pre-determined operating resonance frequency.
Futurewei Technologies, Inc.

Systems, devices, and methods for electric power generation from vocal folds vibrations

Apparatus and methods are provided for the generation of electrical power from acousto-mechanical vibrations originating from the vocal folds of the human body. The apparatus and methods can include one or more beams comprising a piezoelectric material, such as lead zirconate titanate (pzt), coupled to a power circuitry.

Vibration type driving apparatus, interchangeable lens and imaging apparatus including vibration type driving apparatus, and adjusting vibration type driving apparatus

A vibration type driving apparatus includes a first vibrator including an electro-mechanical energy conversion element and configured to be in pressure contact with a driven member, a second vibrator including an electro-mechanical energy conversion element and configured to be in pressure contact with the driven member, and a first electric element connected in series with the second vibrator. The first vibrator is connected to a driving circuit, the second vibrator and the first electric element are connected in parallel with the first vibrator, the second vibrator is connected to the driving circuit via the first electric element, and a resonance frequency f of the first vibrator and a resonance frequency f2 of the second vibrator satisfy a relationship f1<f2..
Canon Kabushiki Kaisha

Balun for trapping rf current on a transmission line

Apparatus and method for a radially attachable rf trap attached from a side to a shielded rf cable. In some embodiments, the rf trap creates a high impedance on the outer shield of the rf cable at a frequency of rf signals carried on at least one inner conductor of the cable.
Life Services Llc

Magnetic element and memory device

According to one embodiment, a magnetic element includes a first stacked unit and a third ferromagnetic layer. The first stacked unit includes first and second ferromagnetic layers, and a first non-magnetic layer.
Kabushiki Kaisha Toshiba

Electro-optical modulator and generating an electrical optical modulator

An electro-optical modulator is provided. The electro-optical modulator comprises at least one optical waveguide; a plurality of segments, wherein each one of the segments comprises at least one waveguide electrode for supplying a voltage to the optical waveguide, wherein the segments are arranged one behind the other along the optical waveguide, and wherein each one of the segments comprises its own driver unit electrically connected to the waveguide electrode of the segment for supplying an electric signal.
Fraunhofer-gesellschaft Zur FÖrderung Der Angewandten Forschung E.v

Plasmonic enhancement of zinc oxide light absorption for sunscreen applications

Zinc oxide compositions as well as techniques for plasmonic enhancement of zinc oxide light absorption for sunscreen applications are provided herein. One example method includes selecting one or more metal particles to be used in conjunction with one or more zinc oxide particles in a sunscreen composition, wherein said selecting is based on the plasmon resonance frequency associated with each of the metal particles, and blending the metal particles and the zinc oxide particles within a medium to create the sunscreen composition..
International Business Machines Corporation

Plasmonic enhancement of zinc oxide light absorption for sunscreen applications

Zinc oxide compositions as well as techniques for plasmonic enhancement of zinc oxide light absorption for sunscreen applications are provided herein. One example method includes selecting one or more metal particles to be used in conjunction with one or more zinc oxide particles in a sunscreen composition, wherein said selecting is based on the plasmon resonance frequency associated with each of the metal particles; and coating at least one portion of the surface of each of the one or more zinc oxide particles with the metal particles.
International Business Machines Corporation

Scanning endoscope apparatus

A scanning endoscope apparatus is provided that includes: an endoscope having a light guide portion configured to guide and emit an illuminating light for illuminating a subject, and an actuator configured to oscillate the light guide portion; a storage portion configured to store a resonance frequency at a time when the light guide portion is caused to oscillate in a resonant state; an application portion configured to sequentially apply a plurality of signals having different frequencies to the actuator; a signal monitoring portion configured to monitor signals that are applied to the actuator; and a determination portion configured to compare a frequency of a signal which is smallest in a case where the actuator is taken as a load with the resonance frequency stored in the storage portion to determine whether or not the endoscope is abnormal.. .
Olympus Corporation

Electronic use in a communication system

A system and method of an electronic apparatus for use in a communication system includes a switching module arranged to combine a plurality of input signals received by a plurality of input ports in connection with the switching module to define a combined input signal having a plurality of frequency components; and a loading module arranged to receive the combined input signal from the switching module and to individually separate each of the plurality of frequency components of the combined input signal by processing the combined input signal with a plurality of resonating networks, each arranged to resonate at a resonance frequency associated with each of the plurality of frequency components of the combined input signals.. .
City University Of Hong Kong

Power conversion device

In a power converter having a semiconductor switch, common-mode noise is effectively reduced by setting the common-mode inductance value of reactors which are inserted into both lines such that the resonance frequency of the combined capacity of a line-to-ground bypass capacitor and the reactors which are inserted into both lines becomes a predetermined value or more.. .
Mitsubishi Electric Corporation

Tunable/de-tunable wireless power resonator system and related methods

A wireless power transmission (wpt) system. Implementations may include a power source coupled with a first wireless power transmission (wpt) system and a load coupled with a second wpt system including a sense circuit.
Semiconductor Components Industries, Llc

Wireless charging method, wireless charging device, and wireless charging system

A wireless charging method includes obtaining charging information of a plurality of electronic devices, and charging the plurality of electronic devices in sequence according to the charging information of the plurality of electronic devices. For each electronic device, a charging resonance frequency is chosen and accordingly the corresponding wireless charging power is provided for charging..
Wistron Corporation

Composite over wrap

A composite wrap is provided for damping vibration in an elongated quill shaft having a cylindrical body. The composite wrap includes interior layering for disposition about a cylindrical body, exterior layering configured to define an exterior composite wrap shape and sequential cured-in-place, vibration damping, fibrous epoxy layers.
Sikorsky Aircraft Corporation

Driving circuit for a vibration type actuator, vibration device, image blur correction apparatus, replacement lens, image pickup apparatus, and automatic stage

A driving circuit for a vibration type actuator includes an inductor and a capacitor which are connected in series to an electric-mechanical energy conversion element, in which, in a case where a series resonance frequency based on the inductor and the capacitor is set as fs, and a resonance frequency in a vibration mode other than vibration used for driving of the vibrator is set as fu, 0.73·fu<fs<1.2·fu is satisfied.. .
Canon Kabushiki Kaisha

Haptic driver with attenuation

In each of the various embodiments, a haptic driver is configured to attenuate a drive signal of an actuator. In particular, the haptic drivers described herein are configured to identify the resonance frequency of the actuator and to attenuate the haptic drive signal within a range of frequencies, the range being based on the identified resonance frequency.
Immersion Corporation

Vibration motor controller, and lens apparatus and image pickup apparatus that include the same

A vibration motor controller controls driving velocity of a vibration motor relatively moving a vibrator and a contactor contacting the vibrator, the vibrator oscillated by an electromechanical energy transducer to which first and second frequency signals having a phase difference are applied, and includes a phase difference determiner storing a relationship between the frequency and phase difference between the first and second frequency signals, and determines the phase difference with respect to the frequency based on the relationship, and a controller controlling velocity of the vibration motor based on the frequency of the first and second frequency signals and the phase difference determined by the phase difference determiner based on the frequency. The relationship between the frequency and phase difference in the phase difference determiner does not include a relationship between frequency lower than a resonance frequency in frequency-velocity characteristics of the vibration motor, and the phase difference..
Canon Kabushiki Kaisha

Dual band mems acoustic device

A device includes a first microelectromechanical systems (mems) transducer, a second mems transducer and a summing device. A first dimension of the first mems transducer is predefined to configure the first mems transducer to have a first resonance frequency.
Knowles Electronics, Llc

Resonance frequency check method and resonance frequency check apparatus

An apparatus includes a memory; and a processor coupled to the memory and configured to: specify a shape type of an opening including a series of planes detected from planes of a plurality of second virtual rectangular parallelepipeds obtained by dividing a first virtual rectangular parallelepiped internally containing a virtual object in a simulated space based on a first shape of a first line obtained by projecting the series of planes from a direction based on a specific plane of the first virtual rectangular parallelepiped onto a projection plane which is perpendicular to the direction and located at a position more distant from the specific plane than the series of planes, calculate a resonance frequency of a wave leaking through the opening, based on the specified shape type of the opening; and present the calculated resonance frequency on a display.. .
Fujitsu Limited

Method for calculating scanning pattern of light, and optical scanning apparatus

Provided is a method for calculating a scanning pattern of light and an optical scanning apparatus. The method includes the steps of: detecting a resonance frequency and an attenuation coefficient of an oscillation part of an optical fiber which guides light from a light source and irradiates an object with the light; and calculating a scanning pattern of the light, based on the detected resonance frequency and attenuation coefficient.
Olympus Corporation

Apparatus and determining cracked eggs by driving vibration

The present invention relates to an apparatus and a method for determining cracked eggs by driving vibrations without hitting eggs. The apparatus for determining cracked eggs comprises an integral type sensor and actuator which carries out applying a vibration to an egg in the state of contacting with the egg and detecting a vibration response signal corresponding to the vibration from the egg at the same time; a determination unit for determining whether or not the egg is cracked based on at least one of a resonance frequency and a quality factor of the vibration response signal detected from the integral type sensor and actuator; and a transport unit for moving the integral type sensor and actuator or the egg relatively to each other..

Catheter with inductive force sensing elements

Various embodiments concerns a system for measuring a force within a body comprising a catheter, the catheter comprising at least one sensor and an element located within the catheter, the element displaceable within the catheter relative to the at least one sensor. The system further comprises control circuitry configured to measure, for each of the at least one sensor, a change in a resonance frequency of the sensor based on a change in distance between the sensor and the element, the change in distance responsive to the force.
Boston Scientific Scimed Inc.

Implant telemetry with dynamic tuning

Systems and methods for maximizing the resonance frequency match between a reader and a controlled device interacting over a narrowband inductive link involve, in various embodiments, features of the controlled device, the reader, or both.. .

One-port surface elastic wave resonator on high permittivity substrate

A surface elastic wave resonator comprises a piezoelectric material to propagate the surface elastic waves and a transducer inserted between a pair of reflectors comprising combs of interdigitated electrodes and having a number nc of electrodes connected to a hot spot and an acoustic aperture w wherein the relative permittivity of the piezoelectric material is greater than about 15, a product of nc·w/fa for the transducer being greater than 100 μm·mhz−1, where fa is the antiresonance frequency of the resonator. A circuit comprises a load impedance and a resonator according to the invention and having an electrical response manifesting as a peak in the coefficient of reflection s11 at a frequency of a minimum value of the parameter s11 that is lower than −10 db, the antiresonance peak of the resonator being matched to the impedance of the load..
Senseor

Method for designing multiple tuned filter in high voltage direct current system

A method for designing a multiple tuned filter (mtf) in a high voltage direct current (hvdc) system includes setting an input parameter constituting the mtf; setting a resonance frequency of the mtf; extracting at least one lc combination case constituting the mtf on the basis of the input parameter and the resonance frequency; performing optimization for harmonic reduction on the lc combination case; and extracting an lc combination case determined based on a result obtained by performing the optimization.. .
Lsis Co., Ltd.

Sensor for measuring an external magnetic field

In general, techniques of this disclosure are directed to a sensor for measuring an external magnetic field. The sensor an optical cavity, a laser medium which together with the optical cavity has a laser threshold, a laser pump, and a radio-frequency (rf) drive applied to the laser medium, such that the laser threshold varies with a change in the external magnetic field.
Rmit University

Oil content measurement device

An oil content measurement device includes a fluid device which mixes water to be treated containing oil content with a solvent and extracts the oil content into the solvent, a sensor unit which has a casing storing a quartz crystal oscillator therein with a ring-like spacer in between, a dispensing nozzle which is disposed above the oscillator at a predetermined gap there between and feeds a predetermined amount of the solvent after the oil content has been extracted on the oscillator, a sensor circuit which measures a resonance frequency of the oscillator, and controller which controls at least the fluid device and the sensor circuit. Provided is a arithmetic logical unit, based on a change amount of the received resonance frequency of the oscillator in the sensor unit to which the solvent after the oil content has been extracted has been fed, measures the oil content remaining on the oscillator..
Hitachi, Ltd.

Reducing resonance peaks and drive tones from a micro-electro-mechanical system gyroscope response

Reducing noise from drive tone and sense resonance peaks of a micro-electro-mechanical system (mems) gyroscope output using a notch filter is presented herein. The mems gyroscope can include a drive oscillation component configured to vibrate a sensor mass at a drive resonance frequency; a sense circuit configured to detect a deflection of the sensor mass, and generate, based on the deflection and the drive resonance frequency, a demodulated output; and a signal processing component configured to receive a set of frequencies comprising a first value representing the drive resonance frequency and a second value corresponding to a sense resonance frequency associated with the sense circuit, and apply, based on the first value and the second value, a notch filter to the demodulated output to obtain a filtered output..
Invensense, Inc.

Method for detection of blood pressure using pressure sensing guide wire

A guide wire has a distal end incorporating a coil and a capacitive element that form a resonance circuit with a resonance frequency that is responsive to the pressure of blood external to the guide wire. The resonance frequency can be detected wirelessly, or through two contacts at the proximal wire end, or through one brush contact located inside an insertion sheath and a ground electrode.
Guided Interventions, Incorporated

Power reception apparatus and wireless power transmission method

A power reception apparatus includes a power reception coil, a relative distance detection section, a power transmission efficiency detection section, a database, a power transmission frequency setting section, and a power transmission request section. The power transmission frequency setting section is configured to read from the database a resonance frequency corresponding to a combination of a relative distance and an initial transmission efficiency and to set the read resonance frequency as a power transmitting frequency.
Honda Motor Co., Ltd.

Microchannel resonator and manufacturing same

Provided is a method for manufacturing a microchannel resonator capable of measuring a mass and characteristics of an object using a principle in which a resonance frequency is changed according to a mass of a moving material, the method including: providing a silicon substrate; forming a cavity channel inside the silicon substrate; forming a hollow silicon oxide structure on the inner wall surface of the cavity channel by oxidizing the inner wall surface of the cavity channel; and partially removing the periphery of the hollow silicon oxide structure such that the hollow silicon oxide structure can resonate with respect to the silicon substrate.. .
Industry-university Cooperation Foundation Sogang University



Resonance Frequency topics:
  • Resonance Frequency
  • Circuit Switch
  • Addressing
  • Signal Processing
  • Low Frequency
  • Ultrasonic
  • Transducer
  • Piezoelectric
  • Shift Module
  • Frequency Band
  • Blood Pressure
  • Wireless Power
  • Circuit Switching
  • Fault Detection
  • Ground Fault Detection Circuit


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    This listing is a sample listing of patent applications related to Resonance Frequency for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Resonance Frequency with additional patents listed. Browse our RSS directory or Search for other possible listings.


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