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| Number | Title | Issue Date |
| 4284403 | Acoustic levitation and methods for manipulating levitated objects Objects are levitated in a sound system substantially free of reverberation and reflection by positioning a small reflector in the path of sound waves. Interference between the primary waves and reflected waves creates a localized zone of minimized energy... | 08/18/1981 |
| 4218921 | Method and apparatus for shaping and enhancing acoustical levitation forces A method and apparatus for enhancing and shaping acoustical levitation forces in a single-axis acoustic resonance system wherein specially shaped drivers and reflectors are utilized to enhance the levitation force and better contain fluid substances by me... | 08/26/1980 |
| 4195523 | Ultrasonic thermometer An ultrasonic thermometer comprising a probe which is coupled to a magnetorestrictive transmitter and has discontinuities to reflect for each ultrasonic pulse applied to the probe a multiplicity of echoes of which the detection provides a measure of the a... | 04/01/1980 |
| 4164727 | Underwater acoustic absorber An underwater acoustic absorber and reflector having an impervious rigid al bonded to a rubber tile. When installed on baffle plates of an underwater vehicle the absorber maintains its efficiency under hydraulic pressure.... | 08/14/1979 |
| 4124895 | Acoustic measuring system A remote terminal for use in an acoustic measuring system comprises a measuring device including an input terminal supplied with an analog signal to be measured, an A/D converter for converting the analog signal to a digital signal and an output terminal ... | 11/07/1978 |
| 4121464 | System and method for geophysical prospecting by measurement of earth tides To locate potentially hydrocarbon-bearing subsurface formations, tiltmeters measure the time of arrival and the apparent direction of a lunar-induced earth tide at an array of points on the earth's surface. The measurements are combined to determine the s... | 10/24/1978 |
| 4052181 | Acoustic energy shaping A suspended mass is shaped by melting all or a selected portion of the mass and applying acoustic energy in varying amounts to different portions of the mass. In one technique for forming an optical waveguide slug, a mass of oval section is suspended and ... | 10/04/1977 |
| 4002221 | Method of transmitting ultrasonic impulses to surface using transducer coupling agent Gel compositions are disclosed containing a primary thickening agent (e.g. carboxy polymethylene polymer) combined with small but effective amounts of an auxiliary hydroxy-containing thickener, e.g. an hydroxy alkyl cellulose polymer. The gel is particula... | 01/11/1977 |
| 3949351 | Variable delay line A device for varying the velocity of infrasonic, sonic, and ultrasonic sound waves which has a sound wave transmission element made of a material having the formula Rx Fe1.sub.-x wherein R is a rare earth selected from the group cons... | 04/06/1976 |
| 3939771 | Seismic explosive charge loader and anchor A seismic explosive charge loader and anchor is disclosed for loading and anchoring explosives in conventional containers, such as cylindrical packages and cans provided with projecting circumferential rims. The loader includes a first tubular member havi... | 02/24/1976 |
| 3930556 | Method of detecting leak of fluid from a long pipeline A system for systematical detecting a leak of fluid from a long pipe comprising a plurality of apparatuses like microphones set at relatively large intervals within a relatively long limited space, formed by utilizing the wall of the pipe like a space wit... | 01/06/1976 |
