| Patents for H04B 13 - Transmission systems characterised by the medium used for transmission, not provided for in groups (1,959) |
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| 03/22/2005 | US6870795 Acoustic source array system module for underwater operation which can be installed on a motorized boat |
| 03/15/2005 | US6868197 Connector-less high speed underwater data interface |
| 03/09/2005 | CN1592161A M-ary spread spectrum communication method |
| 03/08/2005 | US6865139 Subsea navigation and survey |
| 03/08/2005 | US6864780 Data transmission system using a human body as a signal transmission path |
| 03/03/2005 | US20050047277 Seismic defense system |
| 03/02/2005 | EP1509282A1 Low power signal transmission |
| 02/22/2005 | US6859657 Personal communications apparatus |
| 02/17/2005 | WO2005015789A1 System for communication in pipelines |
| 02/16/2005 | CN1581721A 井下无线通信系统 Underground wireless communication system |
| 02/15/2005 | US6856578 Underwater alert system |
| 02/09/2005 | EP1505430A1 Light tranmitting medium |
| 01/27/2005 | US20050017841 Data transmission system using a human body as a signal transmission path |
| 01/26/2005 | EP1045947B1 Electronic communications system |
| 01/25/2005 | US6847267 Methods for transmitting a waveform having a controllable attenuation and propagation velocity |
| 01/18/2005 | US6845062 Manatee warning system |
| 01/13/2005 | US20050007877 Acoustic system for communication in pipelines |
| 01/11/2005 | CA2358816C Above deck unit for automatic identification system |
| 01/06/2005 | WO2005002096A1 Electric field-detecting optical device, tranceiver, positional information-acquiring system, and information input system |
| 01/06/2005 | WO2005002066A2 Through-the-earth radio |
| 01/06/2005 | CA2531036A1 Through-the-earth radio |
| 12/30/2004 | US20040266497 Through-the-earth radio |
| 12/30/2004 | US20040263350 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters |
| 12/29/2004 | WO2004114557A1 Communication unit |
| 12/29/2004 | WO2004114556A1 Communication unit |
| 12/23/2004 | US20040257241 Method and apparatus for transporting data |
| 11/30/2004 | US6826164 Method and apparatus for multiplexing in a wireless communication infrastructure |
| 11/30/2004 | US6826163 Method and apparatus for multiplexing in a wireless communication infrastructure |
| 11/16/2004 | US6817412 Method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system |
| 11/11/2004 | US20040222843 Signal transmission device and method |
| 11/04/2004 | WO2004095742A2 Communication device and communication apparatus |
| 11/04/2004 | WO2004095741A1 Device for transmitting and receiving sound waves |
| 11/04/2004 | US20040219960 Contemplation wave communication device |
| 11/02/2004 | US6813324 Synchronized communication system |
| 10/26/2004 | US6809498 Power supply apparatus and electronic equipment |
| 10/06/2004 | EP1348267B1 Subsea communication |
| 09/15/2004 | EP1458122A2 Polarized light communication device, transmitter, laser, polarized light communication device for physiological use, reflected light detector, and pulse wave detecting device |
| 09/10/2004 | WO2004077705A1 Communication system, communication method and communication apparatus |
| 09/02/2004 | DE10318561B3 Arrangement for sending/receiving sound waves propagating in water has transformers whose second winding voltages cancel in send mode; third winding of second transformer is shorted in receive mode |
| 09/02/2004 | DE10307188A1 System for bridging space and time, forms bridging medium electromagnetically using rotating magnetic field, with one opening lying opposite another in rapid rotation |
| 09/01/2004 | CN1165123C Signal processing method of underwater sound coherent communication system with high code speed and low error probability |
| 08/25/2004 | CN1524390A Network and methof for connecting antennas to base stations in a wireless communication network using space diversity |
| 08/24/2004 | US6781521 Filters for canceling multiple noise sources in borehole electromagnetic telemetry system |
| 08/12/2004 | WO2004068748A1 Method and system for data communication in human body and sensor therefor |
| 08/05/2004 | US20040152440 Communication apparatus |
| 08/04/2004 | EP1443691A1 COMMUNICATION APPARATUS, COMMUNICATION DEVICE, SUBSTRATE MOUNTING METHOD, AND TOUCH SENSOR |
| 08/03/2004 | US6771161 Data transmission system using a human body as a signal transmission path |
| 07/29/2004 | US20040144530 Toroidal choke inductor for wireless communication and control |
| 07/27/2004 | US6768873 Optical communication system using optical transcription material |
| 07/22/2004 | DE202004003762U1 Electronic unit for transferring sound pulses or signals directly into the body via electrodes applied to the skin surface, said unit having signal coding and amplifying sections separated by insulation of at least 8 mm |
| 07/21/2004 | CN1158781C Personal communications apparatus |
| 07/20/2004 | CA2380300C Electromagnetic antenna extension assembly and method |
| 06/30/2004 | CN1156117C Method, apparatus and communication system for exchanging message in all over environment |
| 06/23/2004 | EP1432140A2 Transceiver capable of causing series resonance with parasitic capacitance |
| 06/17/2004 | WO2004003329A3 Remote down-hole well telemetry |
| 06/10/2004 | WO2004019501A3 Methods for transmitting a waveform having a controllable attenuation and propagation velocity |
| 06/03/2004 | US20040105344 Communication system for underwater use |
| 05/26/2004 | CN1499737A Transceiver able to generate series resonance with parasitic capacitance |
| 05/21/2004 | WO2004036236A3 Manatee warning system |
| 05/13/2004 | US20040092296 Transceiver capable of causing series resonance with parasitic capacitance |
| 05/13/2004 | US20040090865 Underwater communication system |
| 04/29/2004 | WO2004036784A1 Asymmetric information transmission system using an electric near field |
| 04/29/2004 | WO2004036236A2 Manatee warning system |
| 04/29/2004 | US20040079524 Toroidal choke inductor for wireless communication and control |
| 04/22/2004 | US20040076080 Manatee warning system |
| 04/14/2004 | EP1224710B1 Electromagnetic antenna extension assembly and method |
| 04/06/2004 | US6718267 Monitoring the corrosion of pipelines by evaluting the noise in data signals transmitted via the pipeline |
| 04/06/2004 | US6715550 Controllable gas-lift well and valve |
| 03/24/2004 | EP1400141A1 Network and method for connecting antennas to base stations in a wireless communication network using space diversity |
| 03/18/2004 | WO2004023683A2 Contemplation wave communication device |
| 03/18/2004 | US20040051649 Subsea communication |
| 03/17/2004 | EP0928524B1 Pipeline communication system |
| 03/04/2004 | WO2004019501A2 Methods for transmitting a waveform having a controllable attenuation and propagation velocity |
| 03/04/2004 | US20040042342 Subsea navigation and survey |
| 03/04/2004 | CA2833510A1 Methods for transmitting a waveform having a controllable attenuation and propagation velocity |
| 03/04/2004 | CA2496322A1 Methods for transmitting a waveform having a controllable attenuation and propagation velocity |
| 02/26/2004 | DE10238134A1 Car door locking system, includes reception system operated by contacting component of vehicle by carrier of mobile key unit |
| 02/18/2004 | CN1139194C VLF ground wave telephone equipment |
| 02/12/2004 | US20040027385 Information input device |
| 02/11/2004 | EP1036441B1 Method and apparatus for carrying out high data rate underwater communication |
| 02/10/2004 | CA2138147C Data transmission on undersea pipelines |
| 02/05/2004 | US20040021550 Electronic key system |
| 01/29/2004 | WO2004010651A1 Communication unit, communication facility, management device, communication system, and electric field communication device |
| 01/29/2004 | WO2004010618A1 Electric-field communication system, electric-field communication device, and electrode disposing method |
| 01/28/2004 | EP1385283A1 Method of communication through a medium |
| 01/28/2004 | CN1471040A 电子钥匙系统 Electronic key system |
| 01/28/2004 | CN1136681C Method for generating vector potential, energy transmission system and communication system |
| 01/22/2004 | US20040013041 Acoustic source array system module for underwater operation which can be installed on a motorized boat |
| 01/20/2004 | US6679332 Petroleum well having downhole sensors, communication and power |
| 01/15/2004 | US20040008124 System and method for method transmission of electrical signals in imperfectly-conducting media |
| 01/14/2004 | CN1467937A Plant monitoring system |
| 01/08/2004 | WO2004003329A2 Remote down-hole well telemetry |
| 01/07/2004 | EP1378079A2 Communication system for underwater use |
| 01/07/2004 | EP1378078A2 Underwater communication system |
| 01/02/2004 | EP1376481A2 Electronic key system |
| 12/11/2003 | WO2003101536A1 Low power signal transmission |
| 12/04/2003 | WO2003101013A1 Long-distance quantum communication |
| 11/27/2003 | WO2003098341A1 Light tranmitting medium |
| 11/27/2003 | WO2003017538A9 Fiber optic sensor signal amplifier |
| 11/20/2003 | WO2003096073A1 Method and apparatus for transporting data |