| 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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| 04/14/1981 | US4262366 Signal-transmitting system including an optical limb with automatic amplitude limitation |
| 04/14/1981 | US4262365 RFI shield for an IR input circuit |
| 04/14/1981 | US4262362 Fiber optics duplex module |
| 04/14/1981 | US4261641 Active multiport fiber optic data bus coupler |
| 04/14/1981 | US4261639 Optical pulse equalization in single-mode fibers |
| 04/08/1981 | EP0026363A1 Four-gates optical coupler |
| 04/07/1981 | CA1098977A1 Apparatus for transmitting multilevel signals on optical fibres |
| 04/07/1981 | CA1098965A1 Linear signal isolator and calibration circuit for electronic current transformer |
| 03/31/1981 | US4259746 Electrical communications system |
| 03/31/1981 | US4259584 Apparatus for transmitting signals |
| 03/24/1981 | US4258363 Phased array radar |
| 03/24/1981 | US4257707 Device for measuring the attenuation of optical waves on optical transmission paths |
| 03/18/1981 | EP0025216A1 Signalling arrangement in a voice transmission system with optically powered modules |
| 03/17/1981 | US4257126 Logarithmic receiver for fiber optic signals |
| 03/17/1981 | US4257125 Receiver for unipolar Manchester fiber optics signals |
| 03/17/1981 | US4257124 Optical repeater for use in active multiport fiber optic data bus coupler |
| 03/17/1981 | US4257033 Fault locating system in optical fiber transmission system |
| 03/10/1981 | US4255017 Tunable source of coherent electromagnetic radiation based on modulational instability |
| 03/10/1981 | CA1097108A1 Holographic optical satellite communication system |
| 03/03/1981 | CA1096952A1 Feedbackward distortion compensating circuit |
| 02/24/1981 | US4252402 Device for connecting a peripheral unit to an optical bus-line |
| 02/03/1981 | US4249266 Fiber optics communication system |
| 02/03/1981 | US4249264 Method and system for transmitting signals by fiber optics |
| 02/03/1981 | CA1094851A1 Fiber optic relay switch |
| 01/27/1981 | US4247956 Installation for the monitoring of message transmission systems with lightwave conductors |
| 01/20/1981 | US4246475 Fail-safe optical repeater-amplifier assembly for fiber optic systems |
| 01/20/1981 | US4245884 Optical coupler for interconnecting two or more optical transmission lines |
| 01/20/1981 | CA1094210A1 Optoelectronic connector assembly |
| 01/20/1981 | CA1093875A1 Multi-channel coupler for fibre optic links |
| 01/20/1981 | CA1093858A1 Fibre optic cable signal detector and fault locator |
| 01/07/1981 | EP0021897A1 Optical link system for the bidirectional exchange of data between a central unit and peripheral units, and its use in an electronic scanning antenna |
| 01/07/1981 | EP0020878A1 Service integrated information transmission and switching system for sound, picture and data |
| 01/06/1981 | US4243942 Fully relayed regenerative amplifier |
| 01/06/1981 | US4243320 Methods for testing optical fibres |
| 12/23/1980 | US4241456 Remote-controlled receiver |
| 12/23/1980 | US4241455 Data receiving and processing circuit |
| 12/23/1980 | CA1092006A1 Growth of iii-v layers containing arsenic, antimony and phosphorus, and device uses |
| 12/16/1980 | US4240066 Cylindrical encoder for use with fiber optics |
| 12/16/1980 | CA1091790A1 Electro-optical switching system |
| 12/09/1980 | US4238760 Multi-spectrum photodiode devices |
| 12/09/1980 | US4238707 Power supply system for a semiconductor light source |
| 12/09/1980 | US4238648 Termination for telecommunication path |
| 12/02/1980 | US4237550 Multiuser protected optical data bus distribution systems |
| 12/02/1980 | US4237427 Apparatus for stabilizing a laser |
| 11/26/1980 | EP0019234A1 Semiconductor integrated circuit structure |
| 11/25/1980 | US4236256 Asynchronous data receiver |
| 11/25/1980 | US4236255 Rack entry vehicle communication system |
| 11/25/1980 | US4236243 Telecommunication systems |
| 11/25/1980 | US4236086 Apparatus for the detection and processing of electric signals |
| 11/18/1980 | US4234971 Precise RF timing signal distribution to remote stations |
| 11/18/1980 | US4234970 Fiber optic communication system |
| 11/18/1980 | US4234969 Bidirectional optical coupler for a data processing system |
| 11/18/1980 | US4234968 Optical coupler module in a distributed processing system |
| 11/18/1980 | US4234856 Gasdynamic solar powered laser |
| 11/11/1980 | US4233589 Active T-coupler for fiber optic local networks which permits collision detection |
| 11/11/1980 | US4233505 Light receiving circuit having fast response time and a stable output waveform |
| 11/11/1980 | US4232938 Telecommunication systems using optical waveguides |
| 11/11/1980 | CA1089537A1 Remote meter reading system |
| 10/29/1980 | EP0018142A1 Data transmission systems |
| 10/28/1980 | US4231031 Remote control system capable of transmitting the information with the aid of an infra red beam using PPM or an ultrasonic beam using PDM |
| 10/21/1980 | US4229831 Drift compensated fiber optic-receiver |
| 10/21/1980 | US4229830 Apparatus and method for providing a modulation format for multiple wideband signal transmission |
| 10/21/1980 | US4229829 Apparatus for wireless transmission of a teaching program in a classroom |
| 10/21/1980 | US4229819 Data transmission system |
| 10/21/1980 | US4229068 Fiber optic relay switch |
| 10/21/1980 | US4229067 Optical waveguide mode scrambler |
| 10/21/1980 | CA1087891A1 Multi-core optical communications fiber |
| 10/15/1980 | EP0017596A1 Low noise photoreceiver |
| 10/14/1980 | US4228349 III-V Direct-bandgap semiconductor optical filter |
| 10/14/1980 | CA1087690A1 Optical communication system utilizing light emitting diode |
| 10/07/1980 | US4227260 Electronic active star element for an optical data transmission system |
| 10/07/1980 | US4227075 Multichannel fiber optic control system |
| 10/02/1980 | WO1980002092A1 Asynchronous data receiver |
| 10/01/1980 | EP0016608A1 Method and apparatus for signal transmission via an optical fiber |
| 09/30/1980 | US4225213 Connector apparatus |
| 09/23/1980 | US4224666 Data processing system which protects the secrecy of confidential data |
| 09/16/1980 | US4223216 Means for sensing and color multiplexing optical data over a compact fiber optic transmission system |
| 09/16/1980 | US4222880 Fluorescent material in light receiver |
| 09/16/1980 | US4222628 Optical thin film processor for unidimensional signals |
| 09/09/1980 | US4221932 Infrared remote signaling system |
| 09/09/1980 | US4221460 Arrangement for transmitting polarized optical radiations |
| 09/09/1980 | CA1085462A1 Automatic bias control circuit for injection lasers |
| 09/03/1980 | EP0015129A1 Optical circulator |
| 09/03/1980 | EP0014961A1 Method and device for coupling electro-optical converters to light guides |
| 09/02/1980 | US4220395 Polarization converter and circuit elements for use in optical waveguides |
| 08/20/1980 | EP0014634A1 Active coupler between an optical bus line and one of the subscribers, and bus line having such active couplers |
| 08/19/1980 | US4218776 Parametric optical detector |
| 08/19/1980 | US4218692 Light-emitting and light-receiving diode particularly for optical telecommunications |
| 08/19/1980 | US4218613 Amplifier for electric signals |
| 08/19/1980 | CA1084118A1 Deflection-type modulator of laser beam for commmunications |
| 08/12/1980 | US4217598 Electroluminescent photodetector diode and busbar lines using said diode |
| 08/12/1980 | US4217597 Diode which transmits and receives light-rays of the same predetermined wavelength and optical telecommunications device using such a diode |
| 08/12/1980 | US4217488 Secure optical communication components, method, and system |
| 08/06/1980 | EP0013971A1 Means for sensing and color multiplexing optical data over a compact fiber optical transmission system |
| 08/05/1980 | US4216486 Light emitting and light detecting semiconductor device for interfacing with an optical fiber |
| 07/29/1980 | US4215324 Spatial encoding of a laser beam by means of a Stark cell modulator |
| 07/29/1980 | US4215270 Variable optical transmitter |
| 07/29/1980 | US4215269 Fiber optic modem/data set |
| 07/29/1980 | US4214807 Holographic optical satellite communication system |
| 07/22/1980 | US4213677 Light coupling and branching device using light focusing transmission body |