| Patents for G01H 13 - Measuring resonant frequency (1,015) |
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| 04/15/1999 | WO1999018431A1 Method and apparatus for characterizing materials by using a mechanical resonator |
| 03/23/1999 | US5886262 Apparatus and method for comparing corresponding acoustic resonances in liquids |
| 03/23/1999 | CA2011192C Acoustic borehole logging |
| 03/11/1999 | WO1998055974A3 Method and apparatus for detecting a target material by pre-screening a sample for piezoelectric resonance |
| 03/02/1999 | US5877431 Apparatus for measuring tension of belt |
| 02/16/1999 | US5872309 Method for checking the sealing of a package and apparatus for measuring viscosity |
| 12/30/1998 | WO1998059237A1 Dynamic ultrasonic resonance testing |
| 12/10/1998 | WO1998055974A2 Method and apparatus for detecting a target material by pre-screening a sample for piezoelectric resonance |
| 11/24/1998 | US5841030 Process for the determining the vibration characteristics of a body |
| 11/17/1998 | US5837900 System and method for detecting metal ion oxidation in pacing lead |
| 11/17/1998 | US5837885 Method and device for measuring the characteristics of an oscillating system |
| 09/16/1998 | EP0749570B1 Method and device for measuring the characteristics of an oscillating system |
| 09/08/1998 | US5804087 Method of adjusting natural frequency of dual-axis vibratory structure |
| 08/26/1998 | EP0704050B1 Determining metallic material fatigue or integrity of a joint by measuring damping factors |
| 08/19/1998 | CN1191015A Stress testing and relieving method and apparatus |
| 08/04/1998 | US5789666 Resonant sensor for determining multiple physical values |
| 06/25/1998 | WO1998015501A3 Systems and methods for characterization of materials and combinatorial libraries with mechanical oscillators |
| 06/18/1998 | DE19651384A1 Packaging seal verification method with acceleration or rotation sensor |
| 06/16/1998 | US5766137 For obtaining hardness information of a subject |
| 05/20/1998 | EP0842403A1 Stress testing and relieving method and apparatus |
| 05/12/1998 | US5750894 Measurement of tension using natural frequency of vibration |
| 05/06/1998 | EP0839585A2 Method and apparatus for testing transducer horn assembly debubbling devices |
| 04/28/1998 | US5743134 Method and arrangement for determining and/or monitoring a predetermined level of material in a container |
| 04/16/1998 | WO1998015969A2 Mass spectrometers and methods for rapid screening of libraries of different materials |
| 04/16/1998 | WO1998015813A1 Infrared spectroscopy and imaging of libraries |
| 04/16/1998 | WO1998015805A1 Optical systems and methods for rapid screening of libraries of different materials |
| 04/16/1998 | WO1998015501A2 Systems and methods for characterization of materials and combinatorial libraries with mechanical oscillators |
| 04/07/1998 | US5737239 Shaking test method and system for a structure |
| 04/01/1998 | EP0832429A1 Method and apparatus for predicting structural integrity by estimating modal damping factor |
| 03/04/1998 | EP0826949A2 Identification of resonant frequencies of vibration of rotating blades |
| 03/03/1998 | US5723768 Process for the early recognition of hydroplaning of a vehicle tire on a wet road |
| 02/26/1998 | DE19633546A1 Device for contactless scanning of surface |
| 02/10/1998 | US5717141 Method and apparatus for evaluating vibrations of a rotary body while maintaining the rotary body in a static or non-rotational state |
| 01/13/1998 | US5706840 Precision cleaning apparatus and method |
| 12/24/1997 | WO1997048980A1 System and method for detecting metal ion oxidation in pacing lead |
| 12/16/1997 | US5698796 Belt tension measuring apparatus |
| 11/11/1997 | US5686667 Method for determining the approximate resonance frequency of a structure surrounded by a compressible fluid |
| 10/21/1997 | US5679899 Method and apparatus for non-destructive testing of structures |
| 07/29/1997 | US5652386 Method and apparatus for predicting sturctural integrity by estimating modal damping factor |
| 07/01/1997 | US5644084 Method of measuring natural frequency of motor |
| 06/24/1997 | US5641905 Second derivative resonant ultrasound response analyzer |
| 06/19/1997 | DE19548656A1 Frequency analogue measuring method for tensile forces in elastic bodies e.g. springs |
| 05/21/1997 | EP0774109A1 Process for determining the vibration characteristics of a body |
| 05/20/1997 | US5631423 Method for resonant measurement |
| 04/29/1997 | US5625146 Method and system for determining axial modulus |
| 04/15/1997 | US5619997 Passive sensor system using ultrasonic energy |
| 04/03/1997 | WO1997012216A1 Vacuum absolute pressure measurement with resonator to excess temperature |
| 03/27/1997 | DE19535651A1 Verfahren und Vorrichtung zur Absolutdruckmessung in gasverdünnten Räumen Method and apparatus for measuring absolute pressure in gas diluted rooms |
| 03/26/1997 | EP0764842A2 Frequency deviation detecting circuit and measuring apparatus using the frequency deviation detecting circuit |
| 03/26/1997 | EP0764261A1 Instrument for determining the topography of a surface |
| 03/25/1997 | US5614674 Method and apparatus for predicting fatigue by introducing a continuous excitation to determine damping factor |
| 03/06/1997 | DE19634663A1 Oscillometer for measurement of mass flow or density of liquid in pipe |
| 02/18/1997 | US5604335 Measuring method of mass concentration of suspended particulate matter in gas |
| 02/06/1997 | WO1997004291A1 Stress testing and relieving method and apparatus |
| 02/06/1997 | CA2226679A1 Stress testing and relieving method and apparatus |
| 02/04/1997 | US5598822 Knocking detection method for internal combustion engines and ignition timing control method therefor |
| 12/27/1996 | EP0749570A1 Method and device for measuring the characteristics of an oscillating system |
| 12/19/1996 | WO1996041158A1 Method and apparatus for predicting structural integrity by estimating modal damping factor |
| 12/19/1996 | CA2224151A1 Method and apparatus for predicting structural integrity by estimating modal damping factor |
| 12/12/1996 | DE19616574A1 Belt-tension gauge for motor vehicle IC engine |
| 11/28/1996 | DE19620832A1 Adjusting natural frequency of double axis oscillatory construction |
| 11/19/1996 | US5576971 Apparatus for displaying damping effect or base isolation effect |
| 11/13/1996 | EP0741873A1 A passive sensor system using ultrasonic energy |
| 11/07/1996 | DE19616194A1 Meter for measuring belt tension, especially for V-belt used on motor vehicle engine |
| 10/30/1996 | EP0740140A2 Vibration evaluation method for rotary body in static field |
| 10/17/1996 | WO1996032622A1 Instrument for determining the topography of a surface |
| 10/17/1996 | DE19513529A1 Anordnung zur Erfassung der Topographie einer Oberfläche Arrangement for determining the topography of a surface |
| 07/25/1996 | DE19501942A1 Remote ground moisture meter |
| 07/10/1996 | EP0579673B1 Testing implants |
| 07/09/1996 | US5533399 Method and apparatus for non-destructive measurement of elastic properties of structural materials |
| 05/28/1996 | US5520061 Multiple axis transducer mounting collar |
| 05/28/1996 | US5520052 Method and apparatus for determining material structural integrity |
| 04/03/1996 | EP0704050A1 Determining metallic material fatigue or integrity of a joint by measuring damping factors |
| 02/15/1996 | WO1996004532A1 Process for determining the vibration characteristics of a body |
| 02/08/1996 | DE4427692A1 Verfahren zum Bestimmen des Schwingungsverhaltens eines Körpers A method of determining the vibration characteristics of a body |
| 02/08/1996 | DE4418926C1 Process for coating acousto-electric sensor with protein |
| 02/07/1996 | EP0695417A1 Ultrasonic measurement equipment with at least one non-piezoelectric resonator chamber body and outer electroacoustic transducers |
| 01/23/1996 | US5485750 Process for finding the value of parameters capable of changing the resonance frequency of microstructures |
| 01/10/1996 | EP0690976A1 Method and device for determining when the contents of a container reach a given level and/or for monitoring this level |
| 01/02/1996 | US5480529 Apparatus for depositing low stress films |
| 12/19/1995 | US5476009 Method and apparatus for determining material fatigue by measuring damping factors |
| 11/28/1995 | US5469745 System for determining FOVM sensor beat frequency |
| 11/23/1995 | WO1995031693A1 Resonant measurement value sensor |
| 11/23/1995 | DE4417132A1 Resonanter Meßwertaufnehmer Resonant transducer |
| 11/21/1995 | US5467655 Method for measuring properties of cold rolled thin steel sheet and apparatus therefor |
| 11/21/1995 | EP0704050A4 Method and apparatus for determining material fatigue by measuring damping factors |
| 10/31/1995 | CA2006133C Method and apparatus for determining osseous implant fixation integrity |
| 10/24/1995 | US5460031 Knocking detection method for internal combustion engines and ignition timing control method therefor |
| 10/03/1995 | US5455475 For measuring a change of electrical properties |
| 09/19/1995 | US5451884 Electronic component temperature test system with flat ring revolving carriage |
| 09/14/1995 | WO1995024630A1 Method and device for measuring the characteristics of an oscillating system |
| 09/12/1995 | US5448902 Method for the automatic iterative process optimization of drawing processed in presses |
| 08/15/1995 | US5442288 Magnetoelastic magnetometer |
| 08/03/1995 | WO1995020769A1 A passive sensor system using ultrasonic energy |
| 08/03/1995 | WO1995020749A1 Method and device for determining when the contents of a container reach a given level and/or for monitoring this level |
| 08/03/1995 | CA2182193A1 A passive sensor system using ultrasonic energy |
| 07/25/1995 | US5435191 Natural frequency measurement apparatus and tension measurement apparatus using the same |
| 06/27/1995 | US5426977 Method for establishing the presence of salmonella bacteria in eggs |
| 06/20/1995 | CA2040430C Apparatus for determining and/or monitoring a predetermined contents level in a container |
| 04/25/1995 | US5408880 Ultrasonic differential measurement |