| 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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| 05/22/1991 | EP0428119A2 Coherent optical-fibre communication system using polarisation-diversity transmission |
| 05/22/1991 | EP0428016A2 Laser diode modulation current control |
| 05/21/1991 | US5018130 High-speed optical packet switching system using optical buffer between incoming and outgoing channels |
| 05/21/1991 | US5018129 Dual rail dilated switching networks |
| 05/21/1991 | US5016962 Method of repairing an optical fiber |
| 05/21/1991 | US5016961 Optical apparatus for electrically inter-coupling rotating and stationary devices |
| 05/16/1991 | WO1991007028A1 System for transmitting data between several subscriber stations in a local communications net |
| 05/16/1991 | WO1991007027A1 High linearity optical transmitter |
| 05/16/1991 | WO1991007026A1 Cordless communication system |
| 05/16/1991 | WO1991007011A1 Self-synchronizing infra-red communication system |
| 05/16/1991 | WO1991007010A2 Optical amplifier |
| 05/15/1991 | EP0427586A1 Method and device for transmission of an electromagnetic signal via a fibre optic |
| 05/15/1991 | EP0427109A2 Optical communication network |
| 05/15/1991 | CA2029791A1 Coherent optical-fibre communication system using polarisation-diversity transmission |
| 05/14/1991 | US5016242 Microwave subcarrier generation for fiber optic systems |
| 05/14/1991 | US5015964 Optical amplifiers |
| 05/14/1991 | US5015839 Automatic gain multiplication factor control apparatus and method |
| 05/14/1991 | US5015053 Reduction of modulator non-linearities with independent bias angle control |
| 05/14/1991 | CA2029718A1 Method and apparatus for modulation current regulation for laser diodes |
| 05/08/1991 | EP0426357A2 Optical equalization receiver for lightwave communication systems |
| 05/08/1991 | EP0426222A2 Active fiber optical amplifier having a wide band signal wavelength |
| 05/08/1991 | EP0426221A1 Low-noise optical amplification unit with reflection of the pumping power |
| 05/08/1991 | EP0425871A2 Fiber optic telecommunication system employing continuous downlink, burst uplink transmission format with preset uplink guard band |
| 05/08/1991 | EP0425732A1 Passive optical telecommunicationsystem |
| 05/08/1991 | DE4034193A1 Arrangement for display of product and price data - uses electronic scales connected by infrared transceived to display devices and central processor |
| 05/08/1991 | DE4034154A1 Stored data transmission for processing system - has central computer with infra red transmitter receiver communicating with distributed displays |
| 05/08/1991 | DE3937096A1 System zum uebertragen von daten zwischen mehreren teilnehmerstationen eines lokalen kommunikationsnetzes System to carry over of data between multiple subscriber stations of a local communication network |
| 05/08/1991 | CN1051278A 异步光通信系统 Asynchronous optical communication system |
| 05/07/1991 | US5013907 Optical time domain testing instrument |
| 05/07/1991 | US5013903 Lightwave receiver having differential input |
| 05/07/1991 | US5013116 Polarization control of bidirectionally transmitted beams by a single polarization controller |
| 05/07/1991 | CA1283951C Optical remote control system for electrical device |
| 05/04/1991 | WO1991006881A1 Visual image transmission by fibre optic cable |
| 05/04/1991 | CA2072654A1 Visual image transmission by fiber optic cable |
| 05/02/1991 | EP0425470A2 Method for transmitting binary information in an optical transmission network and optical transmission network |
| 05/02/1991 | EP0425042A1 Method of and device for detecting parameters of a digitally controllable processing circuit for controlling the scanning of a data carrier |
| 05/02/1991 | EP0425014A1 Amplifier for optical fiber telecommunication lines and optical fiber telecommunication lines incorporating said amplifier |
| 05/02/1991 | EP0424967A2 Image signal processing device |
| 05/02/1991 | EP0424643A2 Apparatus and methods for testing optical communications networks |
| 05/01/1991 | CN1012550B Opticalfiber two-way lightwave transmission method implemented by use of active directive coupling device |
| 05/01/1991 | CN1012549B Coding method of light-fiber communication system |
| 04/30/1991 | US5012484 Analog optical fiber communication system, and laser adapted for use in such a system |
| 04/30/1991 | US5012475 Analog compensation system for linear lasers |
| 04/30/1991 | US5012162 Light emitting diode transmitter circuit with temperature compensation |
| 04/30/1991 | US5012113 Infrared system for monitoring movement of objects |
| 04/30/1991 | US5012097 Radiation measuring apparatus |
| 04/30/1991 | CA1283694C Reducing fluctuations in a radiation beam characteristic |
| 04/30/1991 | CA1283570C Acousto-optic fiber-optic frequency shifter using periodic contact with a surface acoustic wave |
| 04/28/1991 | WO1991006882A1 Cable system incorporating highly linear optical modulator |
| 04/28/1991 | CA2065397A1 Cable system incorporating highly linear optical modulator |
| 04/25/1991 | CA2025141A1 Apparatus and methods for testing optical communications networks |
| 04/24/1991 | EP0423666A1 Digital non-linearity correction method for a transmission chain, and device for carrying out the method |
| 04/24/1991 | EP0423434A1 Multiprocessor computer with optical data switch |
| 04/23/1991 | US5010588 Ultrawide-bandwidth low-noise optical receiver |
| 04/23/1991 | US5010587 Appartaus for transmitting a coherent frequency modulated optical signal |
| 04/23/1991 | US5010586 Optical two-way transmission system with loop reflector modulator |
| 04/23/1991 | US5010543 Optical multiplexing |
| 04/23/1991 | US5010542 Multi-stage switching network for light waveguides |
| 04/23/1991 | US5009476 Semiconductor layer with optical communication between chips disposed therein |
| 04/19/1991 | WO1991006157A1 Optical receiver |
| 04/18/1991 | WO1991005414A1 Fiber-based free-space optical system |
| 04/18/1991 | CA2026908A1 Audio commentary system |
| 04/17/1991 | EP0422852A2 Method of producing a semiconductor laser adapted for use in an analog optical communications system |
| 04/17/1991 | EP0422673A2 Photo-receiver |
| 04/16/1991 | US5008958 Polarization-insensitive technique for coherent optical communication |
| 04/16/1991 | US5008957 Multilevel optical signal transmitter |
| 04/16/1991 | US5008524 Optical receiver with extended dynamic range |
| 04/16/1991 | US5007699 Fiber optic reflective tree architecture |
| 04/16/1991 | US5007697 Fibre optic data coupler |
| 04/16/1991 | US5007693 Method for controlling polarizations of signal lights in an optical frequency division multiplex coherent communication system |
| 04/16/1991 | CA1283196C Protocols for very high-speed optical lans |
| 04/14/1991 | CA2027410A1 Photo-receiver |
| 04/10/1991 | EP0421880A1 Multipurpose integrated optics component and distribution network with optical amplification |
| 04/10/1991 | EP0421675A2 Distributed amplification for lightwave transmission system |
| 04/10/1991 | EP0421674A2 Laser driver with temperature compensation |
| 04/10/1991 | EP0421602A2 Hybrid network |
| 04/10/1991 | EP0421449A2 Optical repeater having phase inversion circuit |
| 04/10/1991 | EP0421403A2 Light-receiving element |
| 04/10/1991 | EP0421325A1 Asynchronous optical TDM-communication system |
| 04/10/1991 | EP0420901A1 Procedure and apparatus for the control of electric power. |
| 04/09/1991 | US5007106 Optical Homodyne Receiver |
| 04/09/1991 | US5005952 Polarization controller |
| 04/09/1991 | US5005937 Optical branching equipment and optical network using the same |
| 04/09/1991 | US5005936 Long range bidirectional optical fiber communication link |
| 04/09/1991 | US5005935 Wavelength-division multiplexing optical transmission system |
| 04/09/1991 | CA1282833C Magnetically activating optical data link |
| 04/09/1991 | CA1282832C Method for optical communication of information |
| 04/09/1991 | CA1282831C Optical signal regenerator |
| 04/07/1991 | CA2027036A1 Multipurpose component with integrated optics and distribution network with optical amplification |
| 04/05/1991 | CA2026861A1 Light-receiving element |
| 04/05/1991 | CA2021015A1 Active polarization control servo and method |
| 04/04/1991 | WO1991004642A2 Serial array time-slot interchangers |
| 04/04/1991 | DE4029817A1 Optical super heterodyne receiver - mixes signal with local oscillator using combination of gates and phase shifting circuits |
| 04/04/1991 | DE3928404A1 Input receiver for optical remote control signals - has operator with optical fibre connector coupled to transmitter |
| 04/03/1991 | EP0420742A1 Photoreceptor for frequency-modulated optical signals |
| 04/03/1991 | EP0420468A2 Method and apparatus for optical signal multiplexing/demultiplexing |
| 04/03/1991 | EP0419710A1 Bidirectional fibre-optical telecommunication system for wavelength division multiplexing between a central telecommunication station and a number of remote telecommunication stations |
| 04/02/1991 | US5005212 Interference suppression in optical communication systems |
| 04/02/1991 | US5005084 Remote control television system using supplementary unit for simplified personalized control |
| 04/02/1991 | US5004910 Method of decoding encoded relative spectral data |