Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 13 - Transmission systems characterised by the medium used for transmission, not provided for in groups
Patents for H04B 13 - Transmission systems characterised by the medium used for transmission, not provided for in groups (1,959)
08/1998
08/18/1998US5796827 System and method for near-field human-body coupling for encrypted communication with identification cards
08/11/1998US5794126 Emergency positioning indicating radio buoy having a thermally insulated frequency standard
08/11/1998US5793855 Integrated wireless communication system
07/1998
07/28/1998US5787053 Hydrophone array system
07/21/1998US5784339 Underwater location and communication system
06/1998
06/30/1998US5774421 Underwater measurement device
06/17/1998EP0848512A2 Method of and system for communication between points along a fluid flow
06/17/1998CN1185065A System and method for near-field human-body coupling for encrypted communication with identification cards
06/11/1998CA2224464A1 Method of and system for communication between points along a fluid flow
06/04/1998WO1998023849A1 Borehole data transmission system
05/1998
05/20/1998EP0843425A2 Electronic communication apparatus using the human body as a transmission medium
05/07/1998WO1998013960A3 Pipeline communication system
05/05/1998US5748102 Apparatus for interconnecting an underwater vehicle and a free floating communications pod
04/1998
04/02/1998WO1998013960A2 Pipeline communication system
04/02/1998CA2267334A1 Pipeline communication system
02/1998
02/25/1998EP0824799A1 System for non-contact sensing and signalling using human body as signal transmission medium
01/1998
01/06/1998US5706251 For supplying air to a diver
12/1997
12/23/1997US5701276 Underwater communication system by means of coded pulses
11/1997
11/12/1997EP0806099A1 Communication method
10/1997
10/14/1997US5676576 Submarine deployed sea-state sensor
09/1997
09/25/1997WO1997035388A1 Controlling correlated quantum state probability distributions
09/25/1997CA2258754A1 Controlling correlated quantum state probability distributions
09/10/1997EP0794414A2 Fiber optic hydrophone having rigid mandrel
09/02/1997US5663927 Buoyed sensor array communications system
08/1997
08/28/1997WO1997031438A1 Method and device for telemetry on a metal structure protected by current tapping
07/1997
07/24/1997WO1997026551A1 Underwater communications
04/1997
04/29/1997US5625724 Fiber optic hydrophone having rigid mandrel
01/1997
01/28/1997US5598152 Mine sweeping system for magnetic and non-magnetic mines
01/07/1997US5592156 Underwater alpha-numeric communication system
12/1996
12/24/1996US5587707 Pipeline system
12/17/1996US5586176 Mask apparatus for divers
11/1996
11/26/1996US5579284 Scuba diving voice and communication system using bone conducted sound
11/14/1996WO1996036134A1 System for non-contact sensing and signalling using human body as signal transmission medium
11/13/1996EP0741940A1 Method and apparatus for underwater communication
11/05/1996US5572485 Underwater acoustic transmission method and equipment to improve the intelligibility of such transmissions
10/1996
10/22/1996US5568450 System and processor for real-time extraction of ocean bottom properties
10/15/1996US5565860 Underground information collecting apparatus having a noise cancel function
10/09/1996EP0736984A1 Method of transmitting information and variations of a device for carrying out the said method
09/1996
09/24/1996US5559759 Method of alerting marine mammals and other mammals underwater of the danger of approaching motor vessels
09/24/1996CA2054163C Receiving apparatus
08/1996
08/01/1996WO1996023373A1 Communication method
08/01/1996CA2216416A1 Communication method
07/1996
07/10/1996CN2230996Y Phantom carrier communication equipment
07/09/1996US5535176 Method and system for sensing with an active acoustic array
06/1996
06/27/1996DE4444942A1 Underwater telephony system for submarine communications
06/19/1996CN1124893A 铁轨通讯方法 Rail communication method
12/1995
12/05/1995US5473578 Sonar and calibration utilizing non-linear acoustic reradiation
11/1995
11/28/1995US5471658 Hermetically sealed communication system with rechargeable battery
10/1995
10/03/1995US5455842 Method and apparatus for underwater communication
08/1995
08/29/1995US5445111 Electrified fish barriers
08/15/1995US5442808 System and device transmitting information by changing a substrate temperature
07/1995
07/20/1995WO1995019678A1 Method and apparatus for underwater communication
07/11/1995US5432754 Receiver for receiving a plurality of asynchronously transmitted signals
06/1995
06/29/1995WO1995017797A1 Method of transmitting information and variations of a device for carrying out the said method
05/1995
05/30/1995US5420828 Viewing screen assembly
04/1995
04/05/1995EP0646304A1 Data transmission on undersea pipelines
03/1995
03/29/1995CN1028061C Mine emergency communication cable and method for use
03/07/1995US5396232 Transmitter device with two insulating couplings for use in a borehole
02/1995
02/28/1995US5394141 Method and apparatus for transmitting information between equipment at the bottom of a drilling or production operation and the surface
01/1995
01/11/1995EP0633673A1 Method of acoustic undersea transmission and device to improve intelligibility of such transmissions
01/03/1995US5379034 Apparatus and method of radio communication from a submerged underwater vehicle
12/1994
12/22/1994DE4320160A1 Method and arrangement for signal transmission
09/1994
09/28/1994EP0617196A2 Digital mud pulse telemetry system
05/1994
05/11/1994WO1994010629A1 A receiver for receiving a plurality of asynchronously transmitted signals
04/1994
04/12/1994US5303207 Acoustic local area networks
03/1994
03/17/1994WO1993026115A3 Data transmission on undersea pipelines
03/01/1994US5291194 Apparatus for interconnecting an underwater vehicle and a free-floating pod
02/1994
02/08/1994US5285424 Wide bandwidth fiber optic hydrophone
01/1994
01/04/1994US5276717 Method of and apparatus for generating neutrinos and/or antineutrinos, a neutrino modulation method, and a neutrino beam generator
12/1993
12/23/1993WO1993026115A2 Data transmission on undersea pipelines
11/1993
11/30/1993US5267070 Underwater IR communication system
10/1993
10/05/1993US5251326 Two way communication system for water sports
09/1993
09/28/1993US5249162 Radio frequency phase sensitive wire detector
09/14/1993US5245588 Regenerative radio-frequency wire detector
03/1993
03/10/1993EP0530914A2 Transceiver arrangement for mutually transmitting information in a DC isolated manner
03/05/1993CA2077287A1 Telecommunication system comprising a transceiver arrangement for mutually transmitting information in a dc isolated manner, and transceiver arrangement to be used in the telecommunicaion system
02/1993
02/23/1993US5189415 Receiving apparatus
02/16/1993US5187690 Acoustic transducer system
02/09/1993US5185605 Dive profile recorder
01/1993
01/19/1993US5181135 Optical underwater communications systems employing tunable and fixed frequency laser transmitters
11/1992
11/24/1992US5166906 Towed underwater acoustic speed sensor
11/10/1992CA1310065C Mine emergency communication cable and method for use
10/1992
10/15/1992DE4111641A1 Interplanetary telephonic communication transceiver using disparate vibratory crystals - has 1-turn reception coil wound on 5-microfarad capacitor with copper@ wiring to resiliently-mounted quartz crystal
09/1992
09/08/1992US5146611 Mine communication cable and method for use
06/1992
06/20/1992CA2054915A1 Underwater communication system
06/09/1992US5121366 Underwater communication system
05/1992
05/14/1992DE4135708A1 Empfangsvorrichtung Receiving device
05/13/1992EP0485071A2 Undersea communication system
05/13/1992EP0485070A2 Undersea communication system
04/1992
04/06/1992CA2052850A1 Undersea communication system with use of physical environment
04/06/1992CA2052837A1 Undersea communication system with use of physical environment
03/1992
03/24/1992US5099458 Underwater detection system
02/1992
02/25/1992US5091778 Imaging lidar systems and K-meters employing tunable and fixed frequency laser transmitters
02/06/1992DE4023457A1 System for transmission of measured values - uses HF oscillations galvanically or capacitively couple to pipe network of building
01/1992
01/29/1992EP0468359A2 Arrangement for the transmission of measured values
01/22/1992CN2094157U Earth transmission type wire broadcasting receiver
10/1991
10/23/1991EP0452985A2 Imaging lidar systems and K-meters employing tunable and fixed frequency laser transmitters
10/22/1991US5060085 Deep blue atomic filter with intrinsic solar background reduction
09/1991
09/17/1991US5050136 Super polyelectrolytic communication links
07/1991
07/25/1991WO1991011061A1 High speed communication system in an aquatic environment between two stations
1 ... 9 10 11 12 13 14 15 16 17 18 19 20