| Patents for G01H 5 - Measuring propagation velocity of ultrasonic, sonic or infrasonic waves (840) |
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| 09/28/1983 | EP0089892A2 Method and apparatus for investigating stand-off in a borehole |
| 09/20/1983 | US4405036 Seafloor velocity and amplitude measurement apparatus method |
| 08/31/1983 | EP0087365A1 Method for the ultrasonic measuring of the relationship between the volume of gas present in an enclosure containing a liquid-gas mixture end the total volume of the enclosure |
| 08/30/1983 | US4402068 Method and apparatus for acoustic well logging |
| 05/10/1983 | CA1146256A1 On line ultra-sonic velocity gauge |
| 04/20/1983 | EP0077285A2 Long wavelength acoustic flowmeter |
| 03/17/1983 | WO1983000922A1 Long wavelength acoustic flowmeter |
| 02/22/1983 | US4374477 Ultrasonic measuring device |
| 12/14/1982 | US4364114 Method and apparatus for determining the acoustic velocity of a workpiece |
| 09/15/1982 | EP0060029A2 A method of determining the ratio of the velocities of compressional and shear waves in subterranean formations |
| 06/29/1982 | CA1126850A1 Method of and device for determining the internal structure of a body by means of acoustic beams |
| 06/15/1982 | US4334431 Ultrasonic measuring instrument |
| 06/08/1982 | US4333352 Injection-molded Doppler flowmeter transducer assembly |
| 11/17/1981 | US4300394 Sonic wave travel time measuring system |
| 11/17/1981 | CA1112753A1 Sonar for obtaining a topographic representation of an immersed surface and underlying layers |
| 09/29/1981 | US4291577 On line ultrasonic velocity gauge |
| 07/21/1981 | US4279157 Method of and device for determining the internal structure of a body by means of acoustic beams |
| 03/10/1981 | US4254660 Ultrasonic test method and apparatus with coupling liquid temperature compensation |
| 08/05/1980 | US4216537 Sonar for the topographic representation of a submerged surface and underlying strata |
| 03/18/1980 | US4193291 Slow torsional wave densitometer |
| 12/25/1979 | US4179937 Sound measuring device |
| 11/27/1979 | US4176337 Apparatus for measuring the time between received pulses |
| 10/23/1979 | CA1065060A1 Cross-correlator circuit |
| 09/04/1979 | US4166394 Method for temperature compensation of an ultrasonic measuring device of the concentration of solutions and circuit arrangement for its execution |
| 06/05/1979 | CA1056047A1 Ultrasonic thickness measuring method and apparatus |
| 10/24/1978 | US4121467 Non-destructive technique for surface wave velocity measurement |
| 10/17/1978 | US4121290 Analog sound velocity calculator |
| 10/03/1978 | US4118782 Digital sound velocity calculator |
| 09/19/1978 | US4114455 Ultrasonic velocity measuring method and apparatus |
| 08/15/1978 | US4106327 Anisotropic determination and correction for ultrasonic flaw detection by spectral analysis |
| 08/08/1978 | US4105993 Method for determining elastic constants of geological formations |
| 06/27/1978 | US4097801 Cross-correlator circuit |
| 01/31/1978 | US4070917 Ultrasonic pulse-echo thickness and velocity measuring method |
| 10/04/1977 | US4051718 Apparatus for measuring the velocity of low frequency vibrations |
| 07/26/1977 | US4038629 Propagation delay meter |
| 04/05/1977 | US4015470 Flow measuring method and apparatus |
| 12/07/1976 | US3995501 Shear and compression wave testing and measuring device |
| 11/30/1976 | US3994154 Ultrasonic pulse-echo thickness and velocity measuring apparatus |
| 10/12/1976 | US3985022 Ultrasonic thickness measuring method and apparatus |
| 01/13/1976 | US3932833 Instrument for direct measurement of the velocity of sound in a fluid |