| Patents for G01H 5 - Measuring propagation velocity of ultrasonic, sonic or infrasonic waves (840) |
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| 04/10/1997 | WO1997013145A1 Ultrasonic device for determining bone characteristics |
| 04/08/1997 | US5619475 Method of predicting mechanical failure in formation utilizing stress derivatives which measure formation nonlinearity |
| 04/01/1997 | US5615681 Method for measuring speed of sound in tissue and tissue assessment apparatus |
| 02/06/1997 | WO1996031753A3 Three-dimensional digital ultrasound tracking system |
| 01/29/1997 | EP0572581B1 Method and device for monitoring of a gas flow, in particular a natural-gas flow |
| 01/28/1997 | US5598377 Method for correcting compressional velocity well logs for effects of gas in earth formations |
| 01/14/1997 | US5592943 Apparatus and method for acoustic analysis of bone using optimized functions of spectral and temporal signal components |
| 10/31/1996 | WO1996033657A1 Apparatus and method for acoustic analysis of bone using optimized functions of spectral and temporal signal components |
| 10/10/1996 | WO1996031753A2 Three-dimensional digital ultrasound tracking system |
| 10/10/1996 | CA2215508A1 Three-dimensional digital ultrasound tracking system |
| 09/17/1996 | US5557047 Method and apparatus for ultrasonic wave measurement |
| 08/21/1996 | CN2233571Y Echoing acoustic velocity measuring instrument |
| 07/09/1996 | US5533402 Method and apparatus for measuring acoustic parameters in liquids using cylindrical ultrasonic standing waves |
| 07/09/1996 | US5533399 Method and apparatus for non-destructive measurement of elastic properties of structural materials |
| 07/03/1996 | EP0719520A2 Method and apparatus for measuring speed of sound in tissue |
| 07/02/1996 | US5531124 Ultrasonic flow measuring method and apparatus thereof |
| 06/19/1996 | EP0717272A1 Method for measuring the propagation velocity of ultrasonic acoustic waves through rock fragments |
| 06/11/1996 | US5525854 In-plane ultrasonic velocity measurement |
| 06/11/1996 | US5524626 System and method for determining local attenuation for ultrasonic imaging |
| 05/30/1996 | DE4442078A1 Ultrasonic air mass flow sensor for vehicle engine |
| 05/22/1996 | EP0713080A1 Method and device for measuring with sing-around technique |
| 05/14/1996 | US5515853 Three-dimensional digital ultrasound tracking system |
| 05/01/1996 | CN1031734C Variable time-base admittance measuring method for pulse excitation and system response |
| 04/18/1996 | WO1996011395A1 System for measuring ultrasonically the elastic properties of a moving paper web |
| 03/26/1996 | US5501098 For determining the relative concentrator of components of a gas mixture |
| 03/21/1996 | WO1996008699A1 Method for measuring sound velocity and sample holder |
| 02/27/1996 | US5493910 Method and system of measuring ultrasonic signals in the plane of a moving web |
| 01/31/1996 | EP0693906A1 System and method for external acoustic bone velocity measurement |
| 11/29/1995 | CN2213988Y Musicle gloves |
| 11/21/1995 | US5467655 Method for measuring properties of cold rolled thin steel sheet and apparatus therefor |
| 11/14/1995 | US5465722 Synthetic aperture ultrasound imaging system |
| 10/10/1995 | US5456114 Elastic wave sensing system |
| 09/06/1995 | CN2206949Y Multifunction sound wave parameter surveying instrument |
| 08/29/1995 | US5446278 Fiber optic sensor employing successively destroyed coupled points or reflectors for detecting shock wave speed and damage location |
| 07/13/1995 | WO1995018956A1 Triggering and evaluation arrangement for two ultrasonic transducers operable as a transmitter and receiver |
| 07/05/1995 | EP0661536A1 Acoustic analysis of gas mixtures |
| 07/04/1995 | US5430259 Measurement of stand-off distance and drilling fluid sound speed while drilling |
| 06/27/1995 | US5426979 Frequency spectrum apparatus for determining mechanical properties |
| 06/27/1995 | CA2019439C Mass flow meter working on the coriolis principle |
| 06/14/1995 | EP0657622A2 Method and apparatus for investigating drill string stand-off and drilling fluid sound speed while drilling |
| 05/09/1995 | US5412990 Method for measuring cement thickening times |
| 03/23/1995 | WO1995002169A3 Measuring the time of flight of a signal |
| 03/14/1995 | US5396891 System and method for external acoustic bone velocity measurement |
| 03/02/1995 | DE4430223A1 Ultrasonic flow measuring method and device for carrying out the method |
| 02/28/1995 | US5392635 Acoustic analysis of gas mixtures |
| 02/15/1995 | EP0638823A2 Ultrasonic stand-off gauge |
| 01/19/1995 | WO1995002169A2 Measuring the time of flight of a signal |
| 01/03/1995 | US5379270 Acoustic-optic sound velocity profiler |
| 12/27/1994 | US5377161 Method of determining travel time in drill string |
| 12/08/1994 | DE4322849C1 Method for determining the propagation time (delay time) of sound signals, and a sound-wave propagation-time determining device |
| 10/26/1994 | EP0621462A2 Elastic wave sensing system |
| 10/13/1994 | WO1994022375A1 System and method for external acoustic bone velocity measurement |
| 09/27/1994 | US5349862 Apparatus for measuring the velocity of ultrasonic sound in terms of V(Z) characteristics and ultrasonic microscope using that apparatus |
| 09/22/1994 | DE4403344A1 Method and device for measuring ultrasonic waves |
| 08/23/1994 | US5341345 Ultrasonic stand-off gauge |
| 08/23/1994 | US5339691 Ultrasonic test system |
| 06/01/1994 | CN1024839C Karaoke type electronic instrument controlled by inner plug-in board and necessary suftware |
| 05/04/1994 | CA2106514A1 In-plane ultrasonic velocity measurement |
| 05/03/1994 | US5307679 Method and apparatus for evaluating the drying properties of un-dried wood |
| 04/19/1994 | US5305239 Ultrasonic non-destructive evaluation of thin specimens |
| 03/23/1994 | EP0588401A2 Method of determining travel time in drillstring |
| 03/09/1994 | CN2158290Y Electronic music instrument with game machine |
| 01/04/1994 | USH1280 Linearization of the matched field processing approach to inverse tomography |
| 12/14/1993 | US5269309 Synthetic aperture ultrasound imaging system |
| 12/08/1993 | EP0572581A1 Method and device for monitoring of a gas flow, in particular of a natural-gas flow. |
| 10/27/1993 | CN1077796A Method and device for monitoring of a gas flow, in particular of a natural-gas flow |
| 10/12/1993 | US5251487 Apparatus for acoustically coupling an ultrasonic transducer with a body |
| 08/19/1993 | WO1993012444A3 Synthetic aperture ultrasound imaging system |
| 07/13/1993 | US5226730 Internal temperature monitor for work pieces |
| 07/08/1993 | WO1993013414A1 Method and device for monitoring of a gas flow, in particular of a natural-gas flow |
| 07/08/1993 | CA2101653A1 Monitoring a gas flow |
| 06/29/1993 | CA1319747C Acoustic sub-surface interrogator |
| 06/24/1993 | WO1993012444A2 Synthetic aperture ultrasound imaging system |
| 04/27/1993 | US5206838 Ultrasonic transducer |
| 03/24/1993 | EP0532666A1 Multi-level probe and system for measurement of physical conditions in liquid-containing tanks |
| 02/16/1993 | US5187692 Acoustic transfer function simulating method and simulator using the same |
| 01/19/1993 | CA1312942C Method of determining drill string velocity |
| 12/23/1992 | CN1067312A Time base variable conductance analyzing technique with pulse excitation and system response |
| 11/10/1992 | US5163013 Device for measurement of ultrasonic transit times |
| 10/14/1992 | CN1065333A Karaoke type electronic instrument controlled by inner plug-in board and necessary suftware |
| 09/30/1992 | EP0505949A1 Acoustic transfer function simulating method and simulator using the same |
| 09/01/1992 | US5143072 Apparatus for determining the mechanical properties of a solid |
| 09/01/1992 | US5143069 Diagnostic method of monitoring skeletal defect by in vivo acoustic measurement of mechanical strength using correlation and spectral analysis |
| 06/30/1992 | US5125273 Method and apparatus for measuring the speed of an ultrasonic wave |
| 06/09/1992 | US5121340 Multi-level probe and system for measurement of physical conditions in liquid-containing tanks |
| 06/03/1992 | EP0488084A2 Apparatus for measuring the velocity of ultrasonic sound in terms of V(z) characteristics and ultrasonic microscope using that apparatus |
| 03/21/1992 | WO1992005439A1 Resonant ultrasound spectroscopy |
| 03/21/1992 | CA2069097A1 Resonant ultrasound spectroscopy |
| 03/19/1992 | WO1991019191A3 Multi-level probe and system for measurement of physical conditions in liquid-containing tanks |
| 12/12/1991 | WO1991019191A2 Multi-level probe and system for measurement of physical conditions in liquid-containing tanks |
| 12/03/1991 | US5069075 Mass flow meter working on the coriolis principle |
| 11/05/1991 | US5062296 Resonant ultrasound spectroscopy |
| 10/15/1991 | US5056367 Ultrasonic linear measurement system |
| 09/10/1991 | CA1288858C Measuring the speed of ultrasound in a moving web of paper |
| 08/14/1991 | EP0441531A2 Method and system for digital measurement of acoustic burst travel time in a fluid medium |
| 07/30/1991 | US5035147 Method and system for digital measurement of acoustic burst travel time in a fluid medium |
| 07/04/1991 | DE4017022A1 Ultrasonic received signal insertion point definition circuit - examines RAM contents with regard to signal period and corrects cycle length value |
| 07/04/1991 | DE4017021A1 Ultrasound signal start definition circuitry - forms propagation time and period duration signals using two voltage comparators of differing thresholds |
| 03/02/1991 | CA2020884A1 Method for determining seismic velocities |
| 01/24/1991 | DE3923349A1 Ascertaining reception time of ultrasonic signal - using electroacoustic transducer at receiving point to provide electric signal for regulator comparing evaluating signal with reference |