| 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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| 09/17/1991 | US5050176 Direct modulation phase-shift-keying system and method |
| 09/17/1991 | US5048909 Adiabatic reflection apparatus |
| 09/17/1991 | CA1289276C Optical fiber transmission apparatus, in particular for submarine use |
| 09/17/1991 | CA1289194C Optical communications system comprising raman amplification means |
| 09/14/1991 | WO1991014321A1 An optical multiplexer |
| 09/14/1991 | CA2075293A1 Optical multiplexer |
| 09/12/1991 | DE4007595A1 Polarisation diversity receiver for DPSK photo-signals - has demodulators, each contg. ring mixer with inputs for signal to be modulated and carrier signal respectively |
| 09/11/1991 | EP0446196A2 Method of transmitting binary information in an optical transmission network |
| 09/11/1991 | EP0446163A1 Inter-vehicle communication apparatus by means of infrared rays |
| 09/11/1991 | EP0445978A2 Optical communication system with reduced distortion |
| 09/11/1991 | EP0445943A2 Polarization independent coherent lightwave detection arrangement |
| 09/11/1991 | EP0445364A2 Optical communications system |
| 09/11/1991 | EP0445232A1 Fiber optic link noise measurement and optimization system. |
| 09/10/1991 | US5048120 Arrangement for the generation of an FSK-modulated optical signal having two polarization states that are orthogonal to one another from an FSK-modulated optical transmitted signal |
| 09/10/1991 | US5047835 Lightwave packaging for pairs of optical devices |
| 09/10/1991 | US5046807 Fibre optic transmission system |
| 09/09/1991 | CA2037689A1 Method for transmitting binary information in an instant of some timeslots before the beginning of the transmission |
| 09/05/1991 | WO1991013500A1 Ultra-low-power amplifier for a communications receiver with limited access to power |
| 09/05/1991 | WO1991013376A1 Optical duplexer |
| 09/05/1991 | DE4006510A1 Optical bus system with light guide plates - has plate-shaped bus channel(s) with side coupled bus subscriber radiation inputs and outputs |
| 09/05/1991 | DE4005517A1 Bidirectional signal transmission system using IR light - has identical devices for simultaneous transmission in both directions |
| 09/04/1991 | EP0444688A2 Optical transmitter |
| 09/04/1991 | EP0444348A2 Optimized wavelength-division-multiplexed lightwave communication system |
| 09/04/1991 | EP0444067A1 Communications system. |
| 09/04/1991 | CN1013820B Code creating and seperating device for light-fiber communication system |
| 09/03/1991 | US5046182 Code points for transferring data from a network transmission medium to a station on the network |
| 09/03/1991 | US5046140 Automatic optical frequency acquisition and tracking apparatus for optical coherent communication system |
| 09/03/1991 | US5046139 Optical receiver for subcarrier frequency division multiplexing signals |
| 09/03/1991 | US5046138 Self-aligning analog laser transmitter |
| 09/03/1991 | US5046137 Optical communication system |
| 09/01/1991 | CA2011228A1 Bi-directional optical link |
| 08/28/1991 | EP0443447A2 Bidirectional light or infrared electrical signals transmission system without waveguides |
| 08/28/1991 | CN1054137A Optical amplifier having a single-mode curved active fibre |
| 08/27/1991 | US5043992 Laser driver with temperature compensation |
| 08/27/1991 | US5043976 Loop-back device for half-duplex optical transmission system |
| 08/27/1991 | US5043975 High bandwidth network based on wavelength division multiplexing |
| 08/27/1991 | US5043593 Optical theft deterrent system |
| 08/27/1991 | US5043573 Electro-optic power cell |
| 08/27/1991 | US5042906 Dispersion equalized optical fiber link |
| 08/23/1991 | CA2036917A1 Arrangement for the waveguide-free bidirectional light or infrared transmission of electrical signals |
| 08/21/1991 | EP0442608A2 Transceiver package |
| 08/21/1991 | EP0442553A1 Optical amplifier having a single-mode curved active fibre |
| 08/21/1991 | EP0267216B1 Improvements in or relating to integrated circuits |
| 08/21/1991 | EP0160093B1 Apparatus and method for a universal electronic locking system |
| 08/21/1991 | CN1053981A Method for capacity-variable regional communication transmitted with optical fibre system |
| 08/21/1991 | CN1053980A Method and equipment for large-capacity regional communication transmitted with optical fibre system |
| 08/20/1991 | US5042086 Method and means for transmitting large dynamic analog signals in optical fiber systems |
| 08/20/1991 | US5040864 Optical crosspoint switch module |
| 08/17/1991 | WO1991012658A1 Push-pull optical receiver |
| 08/14/1991 | EP0441211A2 Active fibre optical amplifier, with double-core portions, having a wide signal wavelength band |
| 08/14/1991 | CN1053869A Optical fibre telecommunications line with separate services channels |
| 08/13/1991 | US5040242 Optical communication apparatus and method |
| 08/13/1991 | US5040168 Single wire, infrared, randomly reflected, vehicular multiplexing system |
| 08/13/1991 | US5040033 On same semiconductor chip |
| 08/13/1991 | US5039993 Periodic array with a nearly ideal element pattern |
| 08/13/1991 | US5039952 Electronic gain cell |
| 08/13/1991 | US5039199 Lightwave transmission system having remotely pumped quasi-distributed amplifying fibers |
| 08/13/1991 | US5039194 Optical fiber link card |
| 08/13/1991 | US5039193 Fibre optic single mode rotary joint |
| 08/13/1991 | US5039189 Optical signal distribution network and method of converting independent optical/electrical signals |
| 08/08/1991 | DE4008165A1 Cellular mobile radio system |
| 08/08/1991 | DE4003056A1 Signal connector for plug-in units in broadband exchange - utilises back-plane as support for flat optical waveguide coupled to light-emitting diode and photodetector modules |
| 08/07/1991 | EP0440276A2 Optical fibre telecommunications line with separate service channels |
| 08/07/1991 | EP0440087A2 Optical signal connecting device for plugs of a plug cabinet |
| 08/07/1991 | EP0440081A2 Cellular mobile radio system |
| 08/07/1991 | EP0440024A2 Multistage optical fibre amplifier |
| 08/07/1991 | CN1053720A Looped-network inserter for optical-fibre interface |
| 08/06/1991 | US5038406 Secure two-way submarine communication system |
| 08/06/1991 | CA1287391C Electro optical switch architectures |
| 08/06/1991 | CA1287233C Method of measuring a mode partition characteristics of a laser diode and an apparatus of the same |
| 08/02/1991 | CA2035390A1 Cellular mobile radio system |
| 08/01/1991 | DE4002369A1 Multistage fibre=optic amplifier - provides constant amplification over large range of wavelengths using selective directional coupler and pump light source |
| 07/31/1991 | EP0438832A1 Coherent optical heterodyne transmission system |
| 07/30/1991 | US5036512 Optical apparatus for combining light beam arrays having different wavelengths |
| 07/30/1991 | US5036189 Thermal control for laser diode used in outside plant communications terminal |
| 07/30/1991 | US5036188 Remote-control-light detecting device for AV apparatus |
| 07/30/1991 | US5035481 Long distance soliton lightwave communication system |
| 07/25/1991 | WO1991011867A1 Passive optical network |
| 07/25/1991 | WO1991011061A1 High speed communication system in an aquatic environment between two stations |
| 07/25/1991 | DE4001442A1 Defective station by=pass arrangement for optical data transmission - is activated by drop=out of electromagnet causing rocker to pivot out of direct optical transmission path |
| 07/24/1991 | EP0438155A2 Optical communication equipment and optical communication method |
| 07/24/1991 | EP0438022A2 Method for deskewing bits in a communication system using wavelength division multiplexing |
| 07/24/1991 | EP0437954A1 Optical-electronic interface module |
| 07/24/1991 | EP0437931A2 Packaging for a pair of optical devices |
| 07/24/1991 | EP0242367B1 Asynchronous communication system |
| 07/23/1991 | US5034997 Communication system for data transmission and reception using radio wave and optical transmission of message signals |
| 07/23/1991 | US5034944 Optical fiber bus controller |
| 07/23/1991 | US5034334 Television |
| 07/23/1991 | US5033833 Omni-directional optical antenna element |
| 07/17/1991 | EP0437198A1 Optical communication system having an improved protection line switching mechanism |
| 07/17/1991 | EP0437162A2 Optical fiber link control safety system |
| 07/17/1991 | EP0437161A2 Optical fiber link card module |
| 07/17/1991 | EP0437116A2 Optical data transfer device |
| 07/17/1991 | EP0437072A1 Point-to-multipoint TDM/TDMA communication system using a packet-based frame structure |
| 07/17/1991 | EP0437066A2 Passive tap network |
| 07/17/1991 | EP0436958A2 Cell signal processing circuit and optical switch apparatus using the same |
| 07/17/1991 | EP0436820A2 Optical communication network |
| 07/17/1991 | EP0436766A1 Medical diagnostic system |
| 07/17/1991 | CN2081177U Self-correcting type light guide sensor |
| 07/16/1991 | US5033114 Laser calibration |