| Patents for H04B 11 - Transmission systems employing ultrasonic, sonic or infrasonic waves (1,545) |
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| 09/24/1996 | US5559757 Spatial diversity processing for underwater acoustic telemetry |
| 09/18/1996 | CN2235461Y Radar like program controlled water saving device |
| 09/17/1996 | US5557584 Moderate depth underwater surveillance system |
| 09/10/1996 | US5555533 Control system for diver VOX/PTT communication system |
| 08/13/1996 | US5546359 Method and transmitter/receiver for transferring signals through a medium in pipes and hoses |
| 08/13/1996 | US5545984 Damping device for sonic waveguides |
| 08/02/1996 | CA2141619A1 Ultrasonic paging device for underwater divers |
| 07/23/1996 | US5539705 Ultrasonic speech translator and communications system |
| 07/09/1996 | US5535176 Method and system for sensing with an active acoustic array |
| 06/27/1996 | DE4444942A1 Underwater telephony system for submarine communications |
| 06/26/1996 | EP0718792A1 Ultrasonic wireless controlling device of pointing type |
| 06/25/1996 | US5530682 Method and apparatus for transmitting an information signal |
| 06/04/1996 | US5523982 For diver to diver communication |
| 05/09/1996 | WO1996013786A1 Electronic process and device for carrying out transactions related to lottery and betting games |
| 05/02/1996 | DE4439484A1 Verfahren und Vorrichtung zur elektronischen Abwicklung von Lotterie- und Wettspielen Method and apparatus for electronic processing of lottery and betting games |
| 04/23/1996 | US5511044 Thrust producing apparatus |
| 03/26/1996 | US5502688 Feedforward neural network system for the detection and characterization of sonar signals with characteristic spectrogram textures |
| 03/24/1996 | CA2132932A1 Wireless communication system between keypad and terminal |
| 03/21/1996 | DE4432666A1 Flexible coaxial transfer cable for transmitting laser light |
| 02/20/1996 | US5493540 System for estimating far-field acoustic tonals |
| 12/26/1995 | US5479490 Voice responsive remote-controllable system |
| 12/19/1995 | US5477507 Ribbon splicing method and apparatus |
| 12/05/1995 | US5473578 Sonar and calibration utilizing non-linear acoustic reradiation |
| 10/03/1995 | US5455842 Method and apparatus for underwater communication |
| 09/20/1995 | EP0672819A2 Method and transmitter/receiver for transferring signals through a medium in pipes and hoses |
| 09/14/1995 | WO1995024661A1 An infrasonic frequency resonant circuit and method for use thereof |
| 09/14/1995 | WO1995024658A1 Method and apparatus for detecting local precursor seismic activity |
| 09/14/1995 | WO1995024171A1 Integral device for active control of noise in ducts |
| 09/05/1995 | USH1491 Broad band, high frequency, high sensitivity beam forming array |
| 08/23/1995 | CN2205996Y Multifunctional electric outlet box |
| 08/17/1995 | WO1995022065A1 Sonic wave synchronizer |
| 08/15/1995 | US5442343 Ultrasonic shelf label method and apparatus |
| 07/20/1995 | WO1995019678A1 Method and apparatus for underwater communication |
| 07/18/1995 | US5433736 Implantable medical apparatus and extracorporeal programming and control unit therefor |
| 07/18/1995 | CA2022106C Voice responsive remote-controllable system |
| 07/11/1995 | US5432755 Ultrasonic signal detector |
| 07/11/1995 | US5432754 Receiver for receiving a plurality of asynchronously transmitted signals |
| 06/29/1995 | DE4344519A1 Acoustic waveguide giving definite surface radiation or reception |
| 06/15/1995 | WO1995016312A1 Apparatus for improved underwater acoustic telemetry utilizing phase coherent communications |
| 05/02/1995 | US5412620 Hydroacoustic communications system robust to multipath |
| 03/02/1995 | WO1995006309A1 Voice operated remote control system |
| 02/21/1995 | US5392256 Magneto-acoustic signal conditioner |
| 01/11/1995 | EP0633673A1 Method of acoustic undersea transmission and device to improve intelligibility of such transmissions |
| 12/28/1994 | EP0631226A1 Apparatus and method for ultrasonic communication |
| 11/22/1994 | US5367614 Three-dimensional computer image variable perspective display system |
| 11/15/1994 | US5365206 Surface acoustic wave reflector filter having z-shaped propagation paths |
| 11/02/1994 | EP0565597B1 Signal-transmission method and device |
| 10/26/1994 | EP0571365B1 Surface-wave reflector-filter |
| 07/19/1994 | US5331602 Acoustic navigation and diving information system and method |
| 05/31/1994 | US5317544 Multiple segment fiber optic hydrophone |
| 05/18/1994 | EP0597313A1 Road users information transmitting method |
| 05/11/1994 | WO1994010629A1 A receiver for receiving a plurality of asynchronously transmitted signals |
| 05/11/1994 | DE4131609A1 Verfahren zum Betreiben einer verformbaren Wandlergruppe und Vorrichtung zur Durchführung des Verfahrens Method for operating a deformable transducer group and device for carrying out the method |
| 05/11/1994 | CN2164616Y Multi-function subultrasonic remote controller |
| 04/12/1994 | US5303207 Acoustic local area networks |
| 04/06/1994 | EP0591021A1 Data transmission device between two different functional elements of a vehicle |
| 04/05/1994 | US5301167 Apparatus for improved underwater acoustic telemetry utilizing phase coherent communications |
| 04/05/1994 | US5301166 Remote control command system |
| 03/02/1994 | CN2158113Y Audible calling device for monitoring limited space |
| 03/01/1994 | US5291459 Signal processor having multiple distributed data buffers |
| 02/22/1994 | CA2076685A1 Ultrasonic emergency call system |
| 12/01/1993 | EP0571365A1 Surface-wave reflector-filter. |
| 11/30/1993 | US5267220 Target surveillance and destruct system |
| 09/28/1993 | US5247924 Shockwave generator using a piezoelectric element |
| 09/07/1993 | US5243327 Audible alarm for motion detection using dual mode transducer |
| 08/04/1993 | CN2139752Y Ultrasonic telecontrol switch |
| 07/22/1993 | WO1993014577A1 Rodent control by sound waves |
| 05/19/1993 | CN2133947Y Remote-controlled electric outlet |
| 05/18/1993 | CA1318017C Sound-responsive switching device |
| 05/04/1993 | US5208787 Rodent control by sound waves |
| 02/16/1993 | US5187691 Underwater signaling device and method |
| 01/27/1993 | CN1068456A Integrated diver face mask and ultrasound underwater voice communication apparatus |
| 01/07/1993 | EP0521597A2 Integrated diver face mask and ultrasound underwater voice communication apparatus |
| 01/06/1993 | CA2062670A1 Integrated diver face mask and ultrasound underwater voice communication apparatus |
| 12/15/1992 | CA1311527C Electromagnetic fire warning system for underground mines |
| 10/27/1992 | US5159580 Acoustic transducer for sending and receiving acoustic communication signals |
| 08/04/1992 | US5136613 Spread Spectrum telemetry |
| 08/04/1992 | US5136555 Integrated diver face mask and ultrasound underwater voice communication apparatus |
| 07/23/1992 | WO1992012581A1 Signal-transmission method and device |
| 06/23/1992 | US5124955 Underwater communication system |
| 06/20/1992 | CA2054915A1 Underwater communication system |
| 06/09/1992 | US5121366 Underwater communication system |
| 05/19/1992 | US5115416 Active transducer assembly for a phased array depth sounder |
| 03/24/1992 | US5099458 Underwater detection system |
| 01/14/1992 | US5081543 Medical diagnostics installation with multiple, wireless control signal transmission channels |
| 11/07/1991 | DE4013978A1 Data transmission system using ultrasound - transmits information via machine bearing to stationary target, for registration or regulation |
| 10/30/1991 | CN2087846U Multi-passage ultrasonic telecontrol switch |
| 10/02/1991 | DE4008250A1 Transmitting information signals in pipelines - using pipeline material as conductive medium for coded acoustic waves |
| 07/17/1991 | EP0436766A1 Medical diagnostic system |
| 07/02/1991 | US5029147 Transmitter |
| 07/02/1991 | US5027820 Device for the three-dimensional focusing of an ultrasonic beam |
| 06/25/1991 | US5027333 Acoustic locator for elements of a flexible sonar array |
| 06/04/1991 | US5022014 Ultrasonic temperature sensors, and ultrasonic waveguide connectors for use therewith |
| 05/21/1991 | US5018114 Adjustable frequency diversity acoustic communications system |
| 05/15/1991 | WO1991007818A1 Surface-wave reflector-filter |
| 05/15/1991 | CA2068531A1 Surface-wave reflector-filter |
| 05/08/1991 | CN1012558B Starting device of motor controlled with ultrasonic wave for toy |
| 04/23/1991 | US5010529 Underwater transmitter apparatus |
| 03/26/1991 | US5003515 Submarine emergency communication transmitter |
| 01/08/1991 | US4984290 Method of controlling communications in a cellular radiotelephone system |