| Patents for H04B 10 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication (73,125) |
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| 07/15/1980 | US4213119 Remote meter reading system providing demand readings and load control from conventional KWH meters |
| 07/15/1980 | US4212537 System for testing optical fibers |
| 07/15/1980 | US4212513 Pulse transformer technique for optical switch |
| 07/15/1980 | CA1081801A1 Regenerator for an optical transmission system |
| 07/09/1980 | EP0012882A1 Device for interconnecting two or more optical transmission lines |
| 07/09/1980 | EP0012818A1 Device for separating an optical signal from the ambient light |
| 07/08/1980 | US4211929 Fiber-optical system for transmitting multilevel signals |
| 07/08/1980 | US4211920 Fault location system for optical repeating paths |
| 07/08/1980 | US4211468 Method and apparatus to provide a secure optical communication system |
| 07/08/1980 | CA1081010A1 Adjustable distributor device for shared transmission of radiant energy in optical fibers |
| 07/01/1980 | US4210803 Method and apparatus for signal transmission via an optical fiber |
| 07/01/1980 | CA1080786A1 Process for increasing the illumination level produced by a laser beam |
| 06/25/1980 | EP0012238A1 Circuit arrangement for closing the remote-feeding loop for serially fed intermediate repeater stations |
| 06/24/1980 | US4209689 Laser secure communications system |
| 06/24/1980 | CA1080307A1 Optical telemetry for aluminium reduction plant bridge cranes |
| 06/17/1980 | CA1079809A1 Retro-reflection communication system |
| 06/10/1980 | US4207460 Low power frequency modulated hybrid fiber optic data acquisition system |
| 06/10/1980 | US4207459 Optical communication system utilizing light emitting diode |
| 06/03/1980 | US4206368 Signal isolating technique |
| 06/03/1980 | US4206347 Acousto-optic multiplexing and demultiplexing |
| 05/27/1980 | CA1078234A1 Precision surface optical fiber |
| 05/15/1980 | WO1980001028A1 Signal switching device through optical means and self switches comprising such device |
| 05/14/1980 | EP0010682A1 Device for transmitting analogue signals over an optical link |
| 05/06/1980 | US4202000 Diode capable of alternately functioning as an emitter and detector of light of the same wavelength |
| 05/06/1980 | US4201909 Data-transmission system and method using fiber-optical transmission |
| 05/06/1980 | CA1077171A1 Electronic postal meter having noise-rejecting input/output channel |
| 05/06/1980 | CA1077170A1 Apparatus and method for transmitting binary-coded information |
| 05/06/1980 | CA1076858A1 Low loss directional coupling for optical fibres |
| 04/29/1980 | CA1076675A1 Optical multifunction control system for a vehicle |
| 04/22/1980 | US4199226 Laser transmitting and receiving device |
| 04/16/1980 | EP0009534A1 Wavelength division system with reduced cross-talking between each of the channels |
| 04/15/1980 | US4198116 Electro-optical switch and modulator |
| 04/08/1980 | CA1075316A1 Light emitting element drive system |
| 04/08/1980 | CA1075057A1 Remote control light transmitting lens system |
| 04/02/1980 | EP0009295A1 Infrared light communication equipment |
| 04/02/1980 | EP0009220A1 System for transmitting signals over an optical link |
| 03/25/1980 | US4195269 Two-way single fiber optical communication system |
| 03/19/1980 | EP0008668A1 Constant current switch and its use for powering infrared light-emitting diodes |
| 03/18/1980 | CA1073716A1 Cladded tapered optical fiber |
| 03/04/1980 | US4191446 Directional coupling-device for multi-mode optical fibres |
| 03/04/1980 | CA1073056A1 Optical pulse transmission system |
| 03/04/1980 | CA1072790A1 Full optical equalizer for transmission of signals via multimode optical wave guides |
| 02/26/1980 | US4190747 Signal corrected optocoupled device |
| 02/26/1980 | US4190318 Optical slip ring apparatus utilizing radial light signals |
| 02/26/1980 | CA1072381A1 Remote control light receiving lens system |
| 02/19/1980 | CA1072187A1 Avalanche photodiode detector |
| 02/12/1980 | US4188550 Photodetector circuit |
| 02/06/1980 | EP0007627A1 Optical receiving system |
| 02/06/1980 | EP0007613A2 Apparatus for spatially encoding a laser beam, comprising a Stark cell modulator |
| 02/05/1980 | US4187421 Optical relay |
| 02/05/1980 | US4187404 Telephone set for optical fibers lines |
| 01/29/1980 | US4185884 Four port optical internal reflectance switchable coupler |
| 01/29/1980 | CA1070807A1 Reversible optoelectronic semiconductor device |
| 01/22/1980 | US4184740 Multi-channel coupler for fibres optic links |
| 01/15/1980 | US4184056 Fault locating system for optical telecommunications |
| 01/15/1980 | US4183666 Method of measuring light transmission losses of optical materials |
| 01/09/1980 | EP0006650A2 Radar system |
| 01/09/1980 | EP0006622A2 Circuit for selectively through-connecting or blocking broad-band signals |
| 01/08/1980 | US4183035 Inverted heterojunction photodiode |
| 01/08/1980 | US4182935 Optical fiber data transmission system |
| 01/08/1980 | US4182544 Resonant multiplexer-demultiplexer for optical data communication systems |
| 01/01/1980 | US4181863 Photodiode circuit arrangements |
| 01/01/1980 | US4181399 Optical internal reflectance switchable coupler |
| 12/18/1979 | US4179702 Cascade solar cells |
| 12/12/1979 | EP0006052A1 Compact optical structure with integrated source |
| 12/11/1979 | US4178515 Optical signal communicating apparatus |
| 12/11/1979 | US4178073 Optical isolator |
| 12/04/1979 | US4176908 Devices for monitoring, switching, attenuating or distributing light |
| 11/27/1979 | US4176401 Digital communications system |
| 11/27/1979 | US4176367 Semiconductor optical device |
| 11/27/1979 | US4175827 Electro-optical multiplexer having multiple frequency resonant excitation |
| 11/27/1979 | CA1067191A1 Laser control circuit |
| 11/20/1979 | US4175230 Method and apparatus for transferring control information between two members |
| 11/20/1979 | CA1066812A1 Apparatus for control and data transfer between a serial data transmission medium and a plurality of devices |
| 11/14/1979 | EP0005256A2 Remote control for radiocommunication devices |
| 11/13/1979 | US4174149 Secure fiber optics communication system |
| 11/06/1979 | US4173723 Photo detector input circuit |
| 11/06/1979 | US4173390 Fiber optic T-coupler |
| 11/06/1979 | CA1065643A1 On line optical fiber loss monitor |
| 10/31/1979 | EP0004980A1 Reversible light beam coupler |
| 10/30/1979 | CA1065140A1 Method for sealing optical fibers to device encapsulations |
| 10/17/1979 | EP0004815A2 System for transmitting optically linked electrical signals and device for the automatic gain control of a receiver path connected to this optical linkage |
| 09/18/1979 | US4168427 Duplex optical communication system with reverse Rayleigh scattered power equalizer |
| 09/18/1979 | US4168107 Multimode optic device |
| 09/18/1979 | CA1062824A1 Two-way telephone transmission system utilizing opto-couplers |
| 09/18/1979 | CA1062778A1 Optical fiber power taps |
| 09/04/1979 | US4166985 Injection laser stabilization |
| 09/04/1979 | US4166947 TTL Compatible LED driver circuit |
| 09/04/1979 | US4166946 Data transmission system |
| 08/28/1979 | US4166212 Recirculating optical delay line |
| 08/28/1979 | CA1061429A1 Method and apparatus for coupling a moving-object sensor to direction-sensitive data utilization apparatus |
| 08/14/1979 | US4164650 Means for reducing nuclear radiation-induced fluorescence noise in fiber-optics communications systems |
| 08/14/1979 | CA1060406A1 Optimized parabolic-index optical fiber communication system with incoherent light source |
| 08/08/1979 | EP0003273A1 Power supply for a semiconductor light source |
| 07/31/1979 | US4163123 Electronic tour guide system |
| 07/24/1979 | US4162460 Optical circuit element |
| 07/24/1979 | US4162400 Fiber optic well logging means and method |
| 07/17/1979 | US4161651 Simultaneously sampled remote data reading and transmission system using optical fibers |
| 07/17/1979 | US4161650 Self-powered fiber optic interconnect system |
| 07/11/1979 | EP0002971A1 Coupling device for an optical transmission line and transmission system comprising such device |