| Patents for G01H 13 - Measuring resonant frequency (1,015) |
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| 03/20/2003 | WO2003023336A1 Methods and apparatus for model based shrouded bellows stiffness determinations |
| 03/20/2003 | CA2459737A1 Methods and apparatus for model based shrouded bellows stiffness determinations |
| 03/19/2003 | CN1403793A Detection method of loosening slot wedge of rotating motor |
| 03/06/2003 | US20030041653 Method and apparatus for characterizing materials by using a mechanical resonator |
| 02/27/2003 | WO2003017459A1 Electric motor controller resonance frequency detection apparatus |
| 01/29/2003 | EP1280185A1 A conduit system for mass spectrometers and methods for rapid screening of libraries of different materials |
| 01/22/2003 | CN1392935A Apparatus and methods for determining natural frequencies of brush seals |
| 01/16/2003 | US20030013541 Method and apparatus for measuring and orienting golf club shaft |
| 01/07/2003 | US6502471 Electrical circuit for testing a transducer horn assembly |
| 01/02/2003 | US20030001570 Method and apparatus for detecting a target material in a sample by pre-screening the sample for piezoelectric resonance |
| 12/26/2002 | US20020197731 Infrared spectroscopy imaging of libraries |
| 12/17/2002 | US6494079 Method and apparatus for characterizing materials by using a mechanical resonator |
| 12/12/2002 | WO2002075261A3 Method for monitoring the oscillatory characteristics of a microfabricated resonant mass sensor |
| 12/05/2002 | US20020178787 Method and apparatus for characterizing materials by using a mechanical resonator |
| 11/19/2002 | US6481288 Measuring the speed of sound of a gas |
| 10/15/2002 | US6463805 Apparatus and method for measuring defect of sample |
| 10/02/2002 | DE10157885A1 Verfahren und Vorrichtung zur Bestimmung des Reifenluftdrucks Method and apparatus for determining the tire air pressure |
| 09/26/2002 | WO2002075261A2 Method for monitoring the oscillatory characteristics of a microfabricated resonant mass sensor |
| 09/12/2002 | DE10155083A1 Method for detecting contact between a user and an operating element on a machine, picks up vibrational properties in the operating element which changes upon contact with a user in order to compare them with preset vibrational properties |
| 09/10/2002 | US6449564 Apparatus and method for monitoring shaft cracking or incipient pinion slip in a geared system |
| 08/29/2002 | WO2002066287A1 Method, computer program, control and or regulating device, device for detecting contact with an operating element, and corresponding operating element |
| 08/22/2002 | US20020113603 Method and apparatus using variable capacitance compensation for thickness shear mode sensors |
| 08/14/2002 | EP1019947B1 Mass spectrometers and methods for rapid screening of libraries of different materials |
| 07/25/2002 | WO2002056977A1 Method and apparatus for measuring and orienting golf club shaft |
| 07/18/2002 | US20020095264 Method and apparatus for estimating tire air pressure |
| 07/11/2002 | US20020088333 Electronic strobe tuning aid |
| 07/09/2002 | CA2267908C Mass spectrometers and methods for rapid screening of libraries of different materials |
| 07/04/2002 | US20020083772 Blade vibration test apparatus and method |
| 06/26/2002 | CN1355433A Tester for measuring frequency of quartz oscillator |
| 06/25/2002 | US6411208 Method and apparatus for detecting a target material in a sample by pre-screening the sample for piezoelectric resonance |
| 06/19/2002 | CN1086469C Stress testing and relieving method and apparatus |
| 06/11/2002 | US6401519 Systems and methods for characterization of materials and combinatorial libraries with mechanical oscillators |
| 05/30/2002 | WO2002029292A3 Apparatus and methods for determining natural frequencies of brush seals |
| 05/28/2002 | US6393895 Method and apparatus for characterizing materials by using a mechanical resonator |
| 05/23/2002 | US20020062194 Apparatus and method for monitoring shaft cracking or incipient pinion slip in a geared system |
| 04/30/2002 | US6378371 Apparatus and methods for determining natural frequencies of brush seals |
| 04/16/2002 | US6373570 Optical systems and methods for rapid screening of libraries of different materials |
| 04/11/2002 | WO2002029292A2 Apparatus and methods for determining natural frequencies of brush seals |
| 03/26/2002 | US6360606 Piezoelectric sensor device and a method for detecting change in electric constants using the device |
| 01/08/2002 | US6336353 Method and apparatus for characterizing materials by using a mechanical resonator |
| 12/27/2001 | US20010054307 Piezoelectric sensor device and a method for detecting change in electric constants using the device |
| 12/13/2001 | DE10027765A1 Portable security unit has alarm criteria based on building air space resonance to avoid false alarms uses mobile phone link |
| 12/11/2001 | US6328660 Method for club fitting |
| 12/11/2001 | CA2108145C Testing implants |
| 11/20/2001 | US6318180 Method and apparatus for determining a frequency at which a resonator resonates |
| 09/18/2001 | US6289735 Machine diagnostic system and method for vibration analysis |
| 08/21/2001 | US6278361 System and method for monitoring vehicle conditions affecting tires |
| 08/02/2001 | US20010010174 Method and apparatus for characterizing materials by using a mechanical resonator |
| 07/11/2001 | EP0764261B1 Instrument for determining the topography of a surface |
| 07/10/2001 | US6257063 Method for measuring vibration damping |
| 07/05/2001 | US20010006911 Method of dynamically determining the relative stiffness of a golf shaft |
| 06/13/2001 | EP1106397A2 System and method for monitoring vehicle conditions affecting tires |
| 05/23/2001 | EP0842403A4 Stress testing and relieving method and apparatus |
| 05/16/2001 | EP1099112A1 Measuring the speed of sound of a gas |
| 04/24/2001 | US6220097 Device for detecting delaminations and methods of use thereof |
| 04/18/2001 | EP1092133A1 Method and apparatus for determining a frequency at which a resonator resonates |
| 03/06/2001 | US6196059 Piezoelectric resonator, process for the fabrication thereof including its use as a sensor element for the determination of the concentration of a substance contained in a liquid and/or for the determination of the physical properties of the liquid |
| 02/20/2001 | US6189366 Method for evaluating transducer horn assembly used in debubbling by comparing frequency dependent impedance to model |
| 02/06/2001 | US6182511 Acoustic bottle tester and conveyor therefor |
| 02/06/2001 | US6182499 Systems and methods for characterization of materials and combinatorial libraries with mechanical oscillators |
| 12/21/2000 | DE19927693A1 Method for determining structural resonances includes diagnostics based on accelerating signals from an equipment surface while looking for resonant frequencies stimulated by shock impacts. |
| 12/19/2000 | US6161418 Apparatus for testing transducer horn assembly debubbling devices |
| 11/30/2000 | DE19924369A1 Testing leak tightness of sensor containing oscillating component by forming quotient of deflection amplitudes, gradient of phase curve or rise time of sensor output signal |
| 10/04/2000 | EP0774109B1 Process for determining the vibration characteristics of a body |
| 09/05/2000 | US6112572 Method for testing transducer horn assembly used in debubbling by monitoring operating frequency via impedance trace |
| 08/29/2000 | US6109092 Method for testing transducer horn Assembly used in debubbling by monitoring operating frequency |
| 08/15/2000 | US6101880 Feedback-responsive piezoelectric vibrating device |
| 07/27/2000 | WO1998015969A3 Mass spectrometers and methods for rapid screening of libraries of different materials |
| 07/26/2000 | EP1021711A4 Systems and methods for characterization of materials and combinatorial libraries with mechanical oscillators |
| 07/26/2000 | EP1021711A2 Systems and methods for characterization of materials and combinatorial libraries with mechanical oscillators |
| 07/19/2000 | EP1019947A2 Mass spectrometers and methods for rapid screening of libraries of different materials |
| 07/19/2000 | EP0832429A4 Method and apparatus for predicting structural integrity by estimating modal damping factor |
| 07/04/2000 | US6083165 Passive sensor system using ultrasonic energy |
| 06/21/2000 | CN1257206A Apparatus and method for mornitoring axle fracture or early gear slippage in gear system |
| 05/31/2000 | EP1004867A2 Apparatus and method for monitoring shaft cracking or incipient pinion slip in a geared system |
| 04/25/2000 | US6053028 Method and apparatus for testing transducer horn assembly for testing transducer horn assembly debubbling devices |
| 03/28/2000 | US6041642 Method and apparatus for sensing the natural frequency of a cantilevered body |
| 03/14/2000 | US6035718 Acoustic bottle tester |
| 03/14/2000 | US6035696 Scan assembly and method for calibrating the width of an input pulse to an ultrasonic transducer of the scan assembly |
| 03/09/2000 | DE19915332A1 Adjustable chassis and running gear for motor vehicle so that for this adjustment resonance of vehicle bodywork is determined by sensor connected with bodywork with evaluation unit |
| 03/09/2000 | DE19840904A1 Determining density of fluid flowing through vibrating pipe section based on known mass and inner volume of pipe section for determining spring constant of pipe section and total mass |
| 03/07/2000 | US6034775 Optical systems and methods for rapid screening of libraries of different materials |
| 02/22/2000 | US6026687 Stress testing and relieving method and apparatus |
| 01/18/2000 | CA2159113C Method and arrangement for determining and/or monitoring a predetermined level of material in a container |
| 12/29/1999 | WO1999067629A1 Measuring the speed of sound of a gas |
| 12/29/1999 | WO1999067608A1 Method and apparatus for determining a frequency at which a resonator resonates |
| 12/07/1999 | US5996395 Frictional dynamic characteristic measuring apparatus |
| 11/23/1999 | US5989190 Passive sensor system using ultrasonic energy |
| 11/16/1999 | US5983723 Ultrasonic measurement equipment with at least one non-piezoelectric resonator chamber body and outer electroacoustic transducers |
| 11/02/1999 | US5974882 Identification of resonant frequencies of vibration of rotating blades |
| 10/20/1999 | EP0950889A1 A piezoelectric sensor device and a method for detecting change in electric constants using the device |
| 10/12/1999 | US5965817 Temperature compensation of resonant frequency measurements for the effects of temperature variations |
| 09/28/1999 | US5959297 Mass spectrometers and methods for rapid screening of libraries of different materials |
| 09/22/1999 | EP0943091A1 Method and apparatus for characterizing materials by using a mechanical resonator |
| 09/14/1999 | US5952576 Concurrent RUS measurements using multiple frequencies |
| 08/11/1999 | EP0934515A1 Infrared spectroscopy and imaging of libraries |
| 07/13/1999 | US5922956 Dynamic ultrasonic resonance testing |
| 06/30/1999 | EP0695417B1 Ultrasonic measurement equipment with resonator chamber body and outer electroacoustic transducers |
| 06/09/1999 | CN1043588C Method for determining optical fiber vibration monit sensor beat frequency |
| 05/19/1999 | EP0741873B1 A passive sensor system using ultrasonic energy |