| Patents for G01H 13 - Measuring resonant frequency (1,015) |
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| 04/20/1995 | DE4402234C1 Process and arrangement for determining and/or monitoring a predetermined filling level in a container |
| 03/29/1995 | EP0628163A4 Apparatus and method for noninvasive characterization of eggs. |
| 02/28/1995 | US5392779 Testing implants |
| 02/23/1995 | WO1995005585A1 Multiple axis transducer mounting collar and method |
| 01/25/1995 | CN1097872A System for determining form sensor beat frequency |
| 01/24/1995 | CA1334053C Self-oscillating, optical resonant sensor |
| 01/17/1995 | US5382340 Measurement, adjustment during deposition |
| 12/21/1994 | EP0582606B1 Process for finding the value of parameters |
| 12/14/1994 | EP0628163A1 Method for noninvasive characterization of eggs |
| 12/07/1994 | EP0627616A2 Method of determining FOVM sensor beat frequency |
| 12/02/1994 | CA2124761A1 System for determining fovm sensor beat frequency |
| 11/29/1994 | US5368044 Vibrational analysis of bones |
| 11/02/1994 | CN1094472A Apparatus for displaying damping effect or base isolation effect |
| 11/01/1994 | US5359879 Scanning micro-sclerometer |
| 10/27/1994 | WO1994024526A1 Ultrasonic measurement equipment with at least one non-piezoelectric resonator chamber body and outer electroacoustic transducers |
| 10/18/1994 | US5355731 Sphericity determination using resonant ultrasound spectroscopy |
| 09/15/1994 | WO1994020826A1 Method and apparatus for determining material fatigue by measuring damping factors |
| 09/15/1994 | CA2157364A1 Method and apparatus for determining material fatigue by measuring damping factors |
| 07/20/1994 | EP0444173B1 Device for determining and/or monitoring a predetermined volume in a container |
| 06/23/1994 | DE4242442A1 Automatic, iterative optimisation of drawing processes in presses - with comparison of the noise emitted during drawing with stored reference values, and control of the holding-down force on the basis of the comparison outcome |
| 04/06/1994 | EP0590893A2 Knocking detection method for internal combustion engines and ignition timing control method therefor |
| 03/23/1994 | EP0587915A1 Characteristic frequency measuring equipment and tensiometer using such equipment |
| 03/17/1994 | DE4327684A1 Sonic test device e.g. for soldered joints - has passive transducer allowing rapid scanning of medium e.g. joint |
| 01/26/1994 | EP0579673A1 Testing implants. |
| 01/13/1994 | DE4223161A1 Mechanical system for determining factor causing natural vibration of rotary or translatory machine work tool - fastens vibrating frame to ball-shaped member, located within complementary shell and couples member and shell with linkage |
| 11/02/1993 | US5257544 For inspecting a test object for defects |
| 10/19/1993 | US5253528 Vibration technique for measuring bonding in automotive radiators |
| 10/14/1993 | WO1993020415A1 Characteristic frequency measuring equipment and tensiometer using such equipment |
| 09/23/1993 | DE4207728A1 Quality testing of test objects - externally stimulating object to emit sound waves which are analysed to classify objects using neural network taught using objects of known class |
| 09/02/1993 | WO1993017318A1 Apparatus and method for noninvasive characterization of eggs |
| 06/01/1993 | CA1318521C Vibrating type transducer and manufacturing process thereof |
| 05/25/1993 | US5212988 Plate-mode ultrasonic structure including a gel |
| 05/25/1993 | US5212987 Acoustic screen scan microscope for the examination of an object in the short-range field of a resonant acoustic oscillator |
| 05/19/1993 | EP0541777A1 Accoustic logic circuits |
| 05/04/1993 | US5207100 Method and device for measuring underwater vehicle hull vibration |
| 04/20/1993 | CA1316589C Method of identification of well damage and downhole irregularities |
| 04/15/1993 | WO1993007463A1 Plate-mode ultrasonic structure including a gel |
| 04/14/1993 | CN1020306C Static test of dynamic rigidity for overhead crane |
| 03/02/1993 | US5191316 Apparatus for determining and/or monitoring a predetermined contents level in a container |
| 03/02/1993 | US5189914 Plate-mode ultrasonic sensor |
| 02/10/1993 | EP0372060B1 An acoustic screen scan microscope for the examination of an object in the short-range field of a resonant acoustic oscillator |
| 12/10/1992 | WO1992022055A1 Accoustic logic circuits |
| 11/12/1992 | WO1992019942A1 Process for finding the value of parameters |
| 11/12/1992 | DE4114268A1 Verfahren zur ermittlung der groesse von parametern, welche die frequenz von eigenschwingungen von mikrostrukturen aendern Method for determining the magnitude of parameters which alter the frequency of natural oscillation of microstructures |
| 11/10/1992 | US5161521 Oscillation degree measuring apparatus |
| 10/29/1992 | WO1992018053A1 Testing implants |
| 10/27/1992 | US5159563 Crack detection method for operating shaft |
| 09/29/1992 | US5150617 Magnetostrictive resonance excitation |
| 09/23/1992 | EP0497823A4 Vibrational analysis of bones |
| 09/15/1992 | US5146776 Method for continuously calibrating an optical vibration sensor |
| 08/12/1992 | EP0497823A1 Vibrational analysis of bones |
| 08/11/1992 | US5138586 Acoustic logic circuits |
| 07/14/1992 | US5129262 Plate-mode ultrasonic sensor |
| 06/17/1992 | EP0331671B1 Self-oscillating, optical resonant sensor |
| 06/16/1992 | US5122764 Circuit for exciting a resonator |
| 05/07/1992 | DE4034883A1 Vibrating tube-type liq. densimeter - has piezoelectric transducers within liq.-tight vibrating tube |
| 04/02/1992 | WO1992005438A1 Crack detection method for shaft at rest |
| 04/02/1992 | WO1992005437A1 Crack detection method for operating shaft |
| 04/01/1992 | EP0449881A4 Method and apparatus for determining osseous implant fixation integrity |
| 03/31/1992 | CA1298381C Piezoelectric phase locked loop circuit |
| 03/25/1992 | EP0463108A4 Shaft crack detection method |
| 02/04/1992 | US5085080 Temperature and pressure measuring technique using the photoacoustic effect and mechanical resonance |
| 01/28/1992 | CA1295018C Method and apparatus for determining resonant frequency of a turbine blade made of a material not responsive to a magnetic field |
| 01/14/1992 | US5081613 Method of identification of well damage and downhole irregularities |
| 01/02/1992 | EP0463108A1 Shaft crack detection method |
| 12/12/1991 | WO1991019173A1 Method for assessing structural integrity of composite structures |
| 11/27/1991 | CN1056577A Static test of dynamic rigidity for overhead crane |
| 11/26/1991 | US5068800 Crack detection method for shaft at rest |
| 10/09/1991 | EP0449881A1 Method and apparatus for determining osseous implant fixation integrity |
| 09/04/1991 | EP0444173A1 Device for determining and/or monitoring a predetermined volume in a container. |
| 07/31/1991 | CN1013407B Vibrating type transducer and manufacturing process thereof |
| 07/31/1991 | CN1013405B Method for determinating turbine blade resonance vibration |
| 06/18/1991 | US5024239 Method and apparatus for determining osseous implant fixation integrity |
| 05/15/1991 | EP0427146A1 Oscillation degree measuring apparatus |
| 05/15/1991 | CN1012628B Method and apparatus for determing resonant frequency of turbing blade made of material not responsive to magnetic field |
| 04/25/1991 | WO1991006245A1 Vibrational analysis of bones |
| 04/25/1991 | CA2069324A1 Vibrational analysis of bones |
| 03/22/1991 | WO1991004467A1 Device for determining and/or monitoring a predetermined volume in a container |
| 03/21/1991 | DE3930902C1 Fibre optic sensor for different physical parameters - has resonant vibrating tongue clamped at one side, with excitation and measurement light wave conductors |
| 12/11/1990 | US4976148 Resonant ultrasound spectrometer |
| 12/04/1990 | US4975855 Shaft crack detection method |
| 11/07/1990 | CN1010346B Self-oscillating optical resonant sensor |
| 10/30/1990 | US4966649 Hermetic sealing of recess gives self-oscillating hollow chamber; amplification |
| 10/09/1990 | US4962489 Acoustic borehole logging |
| 10/03/1990 | EP0390501A2 Acoustic borehole logging |
| 09/20/1990 | WO1990010863A1 Shaft crack detection method |
| 09/15/1990 | CA2044243A1 Shaft crack detection method |
| 08/01/1990 | EP0379622A1 Apparatus and method for testing wooden poles |
| 07/03/1990 | CA1271260A1 Dynamic system analysis in a vibrating beam accelerometer |
| 06/28/1990 | WO1990006720A1 Method and apparatus for determining osseous implant fixation integrity |
| 06/13/1990 | EP0372060A1 An acoustic screen scan microscope for the examination of an object in the short-range field of a resonant acoustic oscillator. |
| 05/22/1990 | US4926693 Contactless actuator piston proximity sensor |
| 05/22/1990 | US4926691 Apparatus and method for testing wooden poles |
| 05/15/1990 | US4926143 Oscillator using H-shaped single crystal silicon vibrator |
| 05/15/1990 | US4924706 Method and apparatus for determining resonant frequency of a turbine blade made of a meterial not responsive to a magnetic field |
| 04/03/1990 | US4912978 Apparatus for determining the oscillation parameters of a band |
| 03/20/1990 | CA1266911A1 Apparatus for detecting the resonant frequency of bones |
| 02/20/1990 | US4901573 Integral structural component vibratory behavior control |
| 12/28/1989 | WO1989012805A1 An acoustic screen scan microscope for the examination of an object in the short-range field of a resonant acoustic oscillator |
| 12/20/1989 | CN1038162A Vibrating type transducer and manufacturing process thereof |