| Patents for H04B 13 - Transmission systems characterised by the medium used for transmission, not provided for in groups (1,959) |
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| 01/02/2002 | EP1168678A1 Data transmission system using a human body as a signal transmission path |
| 01/02/2002 | EP1166476A1 Method and apparatus for data communication with an underground instrument package |
| 01/02/2002 | EP0885495A4 Controlling correlated quantum state probability distributions |
| 01/02/2002 | CN1329782A Method for transmitting information and suitable system therefor |
| 01/01/2002 | US6336031 Wireless data transmission over quasi-static electric potential fields |
| 12/27/2001 | US20010055352 Process and system for information transfer |
| 12/20/2001 | US20010054092 System and method for using data processors |
| 12/13/2001 | WO2001095529A1 Underwater communications system using electromagnetic signal transmission |
| 12/04/2001 | US6327220 Sonar location monitor |
| 11/22/2001 | WO2001089014A1 Fuel cell for downhole and subsea power systems |
| 11/06/2001 | US6314189 Method and apparatus for quantum communication |
| 10/17/2001 | EP1145208A2 Method and device for transmitting control and/or sensor signals |
| 09/13/2001 | WO2001067628A2 Methods for transmitting a waveform having a controllable attenuation and propagation velocity |
| 09/13/2001 | CA2402166A1 Methods for transmitting a waveform having a controllable attenuation and propagation velocity |
| 08/16/2001 | DE10006189A1 All-Sendeempfänger für hohe und niedrige Frequenzen mit Echtzeit All transceivers for high and low frequencies with real-time |
| 08/07/2001 | US6272073 Underwater location and communication device |
| 08/02/2001 | WO2001055555A1 Choke inductor for wireless communication and control in a well |
| 08/02/2001 | WO2001018763A3 Method and device for transmitting control and/or sensor signals |
| 07/17/2001 | US6263189 Narrowband high temperature superconducting receiver for low frequency radio waves |
| 07/11/2001 | EP1115055A2 System and method for using data processors controlled by one or more control devices |
| 07/11/2001 | CN1303187A Portable voice frequency listening equipment |
| 06/13/2001 | EP1107489A2 Duplex digital data transmitting method and apparatus |
| 06/13/2001 | EP1105986A2 Method for transmitting information and suitable system therefor |
| 06/07/2001 | US20010002924 Duplex-system digital-data transmitting method and apparatus |
| 05/30/2001 | EP1102973A1 Monitoring the corrosion of pipelines by evaluating the noise in data signals transmitted via the pipeline |
| 05/23/2001 | EP1102215A2 Data transmission apparatus and data reception apparatus |
| 05/16/2001 | EP1100218A2 Portable audio listening apparatus |
| 05/10/2001 | WO2001033662A1 Electromagnetic antenna extension assembly and method |
| 05/02/2001 | EP1096722A2 Authentication information communication system and method, portable information processing device and program furnishing medium |
| 04/03/2001 | US6211799 Method and apparatus for transbody transmission of power and information |
| 03/15/2001 | WO2001018763A2 Method and device for transmitting control and/or sensor signals |
| 03/15/2001 | DE19942508A1 Verfahren und Vorrichtung zur Übertragung von Steuer- und/oder Sensorsignalen Method and apparatus for transmission of control and / or sensor signals |
| 02/20/2001 | CA2199087C Fiber optic hydrophone having rigid mandrel |
| 02/15/2001 | WO2001011807A1 Synchronized underground communication system |
| 02/15/2001 | CA2381276A1 Synchronized underground communication system |
| 01/30/2001 | US6181644 Diver mask underwater imaging system |
| 12/27/2000 | EP1062753A1 Borehole transmission system using impedance modulation |
| 12/14/2000 | DE19927040A1 Information transmission method produces composite signal from reference and information components individually developing discrete states to assemble pattern of binary digits |
| 11/29/2000 | EP1056233A2 Improvement in underwater communications by means of coded pulses |
| 11/29/2000 | CN1275271A Personal communications apparatus |
| 11/02/2000 | EP1048123A1 Personal communications apparatus |
| 10/25/2000 | EP1045947A1 Electronic communications system |
| 10/17/2000 | US6134281 Method and apparatus for calibration of a signal processing system utilizing digital down converters |
| 10/12/2000 | WO2000060777A1 Method and apparatus for data communication with an underground instrument package |
| 10/11/2000 | EP1043850A2 Wireless data transmission over quasi-static electric potential fields |
| 10/10/2000 | US6130859 Method and apparatus for carrying out high data rate and voice underwater communication |
| 09/26/2000 | US6125080 Underwater communication apparatus and communication method |
| 09/20/2000 | EP1036441A1 Method and apparatus for carrying out high data rate underwater communication |
| 09/12/2000 | US6118882 Communication method |
| 09/06/2000 | EP1033687A2 Advanced personal identification systems and techniques |
| 08/30/2000 | EP0806099B1 Communication method |
| 08/09/2000 | CN1262563A Method, apparatus and communication system for exchanging message in all over environment |
| 08/08/2000 | US6100700 Bridge scour detection and monitoring apparatus using time domain reflectometry (TDR) |
| 08/02/2000 | EP1024626A1 Method, apparatus, and communication system for exchange of information in pervasive environments |
| 07/06/2000 | DE19902983A1 Verfahren und System zur Datenübertragung bei einer Sicherheitseinrichtung eines Kraftfahrzeuges Method and system for data transfer of a safety device of a motor vehicle |
| 06/28/2000 | EP1013517A2 System and method for the transmission of data in a security device for a vehicle |
| 06/22/2000 | WO2000011817A3 Method for transmitting information and suitable system therefor |
| 06/07/2000 | EP1005723A1 Underwater communication apparatus and communication network |
| 05/03/2000 | CN1251961A VLF ground wave telephone equipment |
| 05/02/2000 | US6058071 Magneto-inductive submarine communications system and buoy |
| 04/04/2000 | USRE36643 Buoyed sensor array communications system |
| 03/23/2000 | WO2000015931A1 Electronic communications system |
| 03/22/2000 | EP0987401A2 Drill string telemetry |
| 03/09/2000 | WO2000013329A1 Personal communications apparatus |
| 03/02/2000 | WO2000011817A2 Method for transmitting information and suitable system therefor |
| 02/23/2000 | EP0981252A2 Using discrete message-oriented services to deliver short audio communications |
| 02/17/2000 | WO2000008438A1 Monitoring the corrosion of pipelines by evaluting the noise in data signals transmitted via the pipeline |
| 12/14/1999 | US6002341 Door lock control apparatus for a vehicle |
| 11/23/1999 | US5991602 Method of and system for communication between points along a fluid flow |
| 08/18/1999 | EP0936764A2 Method and apparatus for calibration of digital down converters in a signal processing system |
| 08/18/1999 | EP0936762A1 Polarized light communication device, transmitter, laser, polarized light communication device for organism, reflected light detector and pulse wave detector |
| 08/17/1999 | US5939895 Frozen wave high speed receiver |
| 08/11/1999 | CN1225767A Polarized light communication device, transmitter, laser, polarized light communication device for organism, reflected light detection and pulse wave detector |
| 08/10/1999 | CA2259671A1 Method and apparatus for calibration of digital down converters in a signal processing system |
| 07/28/1999 | CN1224287A Communication system using magnetic vector potential, and sending device and receiving device in communication system |
| 07/22/1999 | WO1999037044A1 Bore hole transmission system using impedance modulation |
| 07/20/1999 | US5926532 Mask apparatus for divers |
| 07/15/1999 | WO1999025070A3 Multi-frequency remote location, communication, command and control system and method |
| 07/14/1999 | EP0928524A2 Pipeline communication system |
| 06/22/1999 | US5914701 Wireless communication system |
| 06/10/1999 | WO1999029058A1 Method and apparatus for carrying out high data rate underwater communication |
| 06/02/1999 | EP0920149A2 Method and apparatus for quantum communication |
| 06/02/1999 | CN1218345A Data communication system and method therefor |
| 05/20/1999 | WO1999025070A2 Multi-frequency remote location, communication, command and control system and method |
| 05/12/1999 | EP0646304B1 Data transmission on undersea pipelines |
| 05/07/1999 | CA2220480A1 Multi-frequency remote communications system |
| 04/22/1999 | WO1999019751A1 Method and apparatus for drill stem data transmission |
| 04/22/1999 | CA2305161A1 Method and apparatus for drill stem data transmission |
| 04/13/1999 | US5894450 Mobile underwater arrays |
| 02/25/1999 | WO1999009683A1 Underwater communication apparatus and communication network |
| 02/10/1999 | EP0896446A1 Data, particularly information transmission with high rate |
| 02/02/1999 | CA2078090C Method and apparatus for transmitting information between equipment at the bottom of a drilling or production operation and the surface |
| 01/13/1999 | CN1204903A Method for generating vector potential, energy transmission system and communication system |
| 01/07/1999 | EP0889607A2 An electric vector potential based communications system |
| 12/23/1998 | EP0885495A1 Controlling correlated quantum state probability distributions |
| 11/12/1998 | WO1998051025A1 Polarized light communication device, transmitter, laser, polarized light communication device for organism, reflected light detector and pulse wave detector |
| 10/20/1998 | US5825718 Underwater communication apparatus and underwater microphone, and closed-type sound converter |
| 10/15/1998 | WO1998045969A1 Communication and alert device for underwater divers |
| 10/15/1998 | CA2577582A1 High impact communication and control system |
| 09/22/1998 | US5811897 Device for the body-bound data transmission between two terminals |