Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 11 - Transmission systems employing ultrasonic, sonic or infrasonic waves
Patents for H04B 11 - Transmission systems employing ultrasonic, sonic or infrasonic waves (1,545)
12/1990
12/04/1990US4975890 Underwater sound transmitting system
08/1990
08/28/1990US4953146 Streamline seismic streamer-cable casing
07/1990
07/31/1990US4945520 Hydro-acoustic device for warning sea mammals
07/24/1990US4943954 Method and a system for counteracting marine biologic fouling of a hull or a submerged construction
07/17/1990US4942534 Data processing apparatus
06/1990
06/19/1990US4934478 Contact sensing apparatus and method
05/1990
05/22/1990CA1269440A1 Security systems for controlling passage between restricted and unrestricted areas
05/16/1990EP0368418A1 Device for focussing an ultrasonic beam in three dimensions
03/1990
03/22/1990WO1990002958A1 Underwater detector
02/1990
02/27/1990US4905211 Precision doppler effect compensator
02/07/1990EP0256018B1 Automotive-contact sensing apparatus and method using acoustic signal
01/1990
01/17/1990EP0351050A1 Ultrasonic temperature sensors, and ultrasonic waveguide connectors for use therewith
08/1989
08/15/1989US4858204 Underwater signaling device
07/1989
07/05/1989CN2040684U Supersonic telecontrol multipurpose single circuit switch
05/1989
05/05/1989WO1989004033A1 System for transmitting and receiving remote-control signals
01/1989
01/25/1989EP0300731A1 Equipment for communication or control
08/1988
08/04/1988EP0256018A4 Automotive-contact sensing apparatus and method using acoustic signal.
02/1988
02/24/1988EP0256018A1 Automotive-contact sensing apparatus and method using acoustic signal.
11/1987
11/19/1987EP0245620A2 Procedure and apparatus for establishing an emergency contact in underground mines
10/1987
10/20/1987US4701681 Starting device for a toy motor using an ultrasonic wave signal
08/1987
08/26/1987EP0233638A2 Process and device for the data transmission from an electrical source (battery) to a data-processing-unit
08/13/1987WO1987004670A1 Contact sensing apparatus and method using acoustic signal
07/1987
07/07/1987US4679177 Underwater communication system
04/1987
04/01/1987CN86102114A Tissue signature tracking transceiver having upconverted if amplification
12/1986
12/24/1986CN86104404A Starting device of motor for toy using ultrasonic wave
11/1986
11/12/1986CA1213968A Control unit
09/1986
09/10/1986EP0193899A1 Tissue signature tracking transceiver having upconverted if amplification
04/1986
04/01/1986US4580250 Ultrasonic detection and communication system for automobiles
01/1986
01/07/1986US4563758 Underwater communicator
12/1985
12/31/1985US4562559 Borehole acoustic telemetry system with phase shifted signal
12/10/1985US4558321 Visitor conversation system
10/1985
10/08/1985CA1194975A1 Ultrasonic transmitter
07/1985
07/01/1985EP0058721A4 Ultrasonic communication and security system.
05/1985
05/14/1985CA1187160A1 Multiplex transmission medium for application in multiplex vehicle control systems
04/1985
04/02/1985US4509153 Resolution transducers, systems and methods for the transmission and/or reception of waves propagated by vibration
01/1985
01/22/1985US4494938 Master buoy system for acoustic array deployment, using underwater glide bodies remotely launched from a submerged pod
11/1984
11/27/1984US4485272 Acoustic feedback cancelling electro-acoustic transducer network
10/1984
10/30/1984US4480323 Remote self-contained undersea monitor
07/1984
07/31/1984US4463452 Tracking and telemetry system for severe multipath acoustic channels
07/24/1984CA1171514A1 Supervised wireless security system
04/1984
04/10/1984US4442515 Electrical control system
02/1984
02/28/1984CA1163012A2 Heating apparatus
02/14/1984US4432079 Synchronous/asynchronous independent single sideband acoustic telemetry
01/1984
01/31/1984CA1161542A1 Method and device for processing wide-band signals having a large dynamic range
11/1983
11/29/1983US4418404 Single-sideband acoustic telemetry
11/08/1983US4414653 Rodent control device
09/1983
09/20/1983CA1154139A1 Electro-acoustic device for the underwater signalling and identification of vessel
06/1983
06/14/1983US4388710 Submarine cable tension telemetering system
01/1983
01/26/1983EP0016783B1 Surface acoustic wave unique word detector and coherent demodulator
01/04/1983US4367458 Supervised wireless security system
12/1982
12/28/1982US4366562 Rodent repelling device
12/21/1982CA1138089A1 Ultrasonic touch control panel
10/1982
10/06/1982EP0061812A1 Disposition of acoustic transducers and use of this disposition in a hands-free telephone apparatus
10/05/1982US4353123 Ultrasonic transmitter
09/1982
09/01/1982EP0058721A1 Ultrasonic communication and security system
06/1982
06/15/1982US4335452 Electro-acoustic device for the underwater signalling and identification of a vessel
05/1982
05/25/1982US4332018 Wide band mosaic lens antenna array
04/1982
04/20/1982US4326274 Transmission system of aerial ultrasonic pulse and ultrasonic transmitter and receiver used in the system
04/06/1982CA1121506A1 Transmission cable for use with an ultrasonic device
03/1982
03/18/1982WO1982000910A1 Ultrasonic communication and security system
02/1982
02/09/1982US4314479 Method and apparatus for transmitting and receiving electromagnetically generated and received ultrasonic pulses
01/1982
01/12/1982US4310904 Ambient sea noise elimination method and apparatus
01/12/1982CA1116284A1 Apparatus and system for wireless reception and transmission of coded audio and/or sonic alarm signals
12/1981
12/29/1981US4307615 Method and apparatus for transmitting and receiving electromagnetically generated and received ultrasonic pulses, primarily at non-destructive testing
12/08/1981US4305143 Automatic man overboard sensor and rescue system
11/1981
11/03/1981CA1111958A1 Digital motor control method and apparatus for measuring-while-drilling
08/1981
08/26/1981EP0034322A2 Ultrasonic transmitter
08/19/1981EP0033741A1 Automatic man overboard sensor and diver rescue system
08/05/1981EP0032981A1 Domestic emergency calling system with remote release
06/1981
06/30/1981US4276624 Acoustic transmission system
06/30/1981US4276623 Underwater audio intercommunication system
06/09/1981US4272835 Master buoy system for acoustic array deployment, using underwater glide bodies remotely launched from a submerged pod
04/1981
04/28/1981US4264882 Electric signal transmission device employing a ferromagnetic amorphous ribbon
02/1981
02/25/1981EP0024262A1 Electroacoustic signalisation and submarine identification device of a ship
02/19/1981WO1981000496A1 Automatic man overboard sensor and diver rescue system
10/1980
10/15/1980EP0016783A1 Surface acoustic wave unique word detector and coherent demodulator.
10/14/1980US4228531 Automatic underwater null steering
10/09/1980EP0016783A4 Surface acoustic wave unique word detector and coherent demodulator.
09/1980
09/09/1980US4222113 Transmit-receive switching unit
08/1980
08/26/1980US4219888 Surface acoustic signal defader
08/19/1980US4217786 Transmission cable for use with an ultrasonic device
07/1980
07/29/1980US4215428 Time ratio controlled inverter
07/15/1980US4213199 Acoustic data link
07/01/1980US4210971 Long distance underwater communication
06/1980
06/17/1980US4208734 Underwater communication system
06/10/1980US4207625 Doppler compensator for heterodyne correlation devices
06/10/1980CA1079389A1 Television remote control system
05/1980
05/13/1980US4203164 Secure sonar communication system
05/13/1980US4203160 Submarine communication
04/1980
04/01/1980US4196406 Ultrasonic control device
03/1980
03/11/1980US4193049 Ultrasonic touch control panel
02/1980
02/19/1980US4189786 Radio buoy assembly
01/1980
01/15/1980US4184209 Towed noisemaker
01/10/1980WO1980000051A1 Surface acoustic wave unique word detector and coherent demodulator
01/08/1980US4183009 Low frequency detection system
01/08/1980US4183008 Noise making device
12/1979
12/25/1979US4180793 PSK pulse synthesizer
10/1979
10/23/1979CA1065043A1 Receiving system of telemetering signal
09/1979
09/25/1979US4169286 Surface acoustic wave unique word detector and coherent demodulator
09/25/1979CA1063229A1 System for collecting information in water
1 ... 5 6 7 8 9 10 11 12 13 14 15 16