| Patents for H04H 20 - Arrangements for broadcast or for distribution combined with broadcast (21,050) |
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| 01/18/1989 | EP0298959A1 Fm receiver with noise suppression during rayleigh faded received signals. |
| 01/10/1989 | US4797918 Subscription control for television programming |
| 01/10/1989 | US4797750 Method and apparatus for transmitting/recording computer-generated displays on an information channel having only audio bandwidth |
| 01/10/1989 | CA1248624A1 Digital signal transmitting system |
| 12/28/1988 | EP0296175A1 Method and installation for digital communication, particularly between and toward moving vehicles. |
| 12/15/1988 | DE3718845A1 Receiving set for broadcast signals with an additional information contained therein (RDS) |
| 12/14/1988 | EP0294511A1 Method for the transmission of digital information |
| 12/07/1988 | EP0293464A1 Process for transmitting and/or evaluating on the receiver side information inside a radio signal. |
| 12/06/1988 | US4789863 Pay per view entertainment system |
| 12/06/1988 | CA1246209A1 Signal matching signal substitution |
| 11/29/1988 | US4788675 For delivering audio information |
| 11/29/1988 | US4788513 Remanent subcarrier component suppressing device for balanced modulator |
| 11/23/1988 | EP0291676A2 Apparatus for the isofrequential broadcasting of radio programmes, particularly in frequency modulation, along a highway |
| 11/17/1988 | EP0290830A2 Demodulator for the demodulation of input signals |
| 11/17/1988 | EP0290679A1 Device for receiving and processing road information messages |
| 11/17/1988 | EP0290581A1 Process for transmitting digital audio-signals. |
| 11/08/1988 | CA1244520A1 Compatible transmission techniques for fm stereophonic radio and television |
| 11/01/1988 | US4782531 Multichannel FM subcarrier broadcast system |
| 11/01/1988 | CA1244090A1 Cryptographic system for direct broadcast satellite network |
| 10/18/1988 | US4779129 FM simultaneous broadcast system for CATV |
| 10/18/1988 | CA1243359A1 Adaptive expanders for fm stereophonic broadcasting system utilizing companding of difference signal |
| 10/12/1988 | EP0285897A2 Local area network system |
| 10/11/1988 | US4777529 Auditory subliminal programming system |
| 09/28/1988 | EP0284101A2 FM/FMX stereophonic receiver |
| 09/28/1988 | EP0283708A2 Radio receiver with two traffic radio decoders |
| 09/21/1988 | EP0283350A1 Broad-band host, particularly for the transmission of music or images |
| 09/20/1988 | US4772870 Power line communication system |
| 09/15/1988 | DE3707244A1 Method for digital transmission of radio signals |
| 09/14/1988 | EP0282347A2 Low-power multi-function cellular television system |
| 09/13/1988 | US4771464 FM stereophonic broadcasting system utilizing simultaneous companding and modulation/demodulation |
| 09/06/1988 | US4769842 Asymmetrical sideband transmission with pseudo-stereo effects |
| 09/06/1988 | US4769841 Receiver for compatible FM stereophonic system utilizing companding of difference signal |
| 08/30/1988 | US4768087 Education utility |
| 08/17/1988 | EP0278192A1 Method for digitally broadcasting in television channels |
| 08/16/1988 | CA1240740A1 Individual simulcast transmitter remote control system |
| 08/02/1988 | CA1239996A1 Radio transmission method for a mobile radio system |
| 07/27/1988 | EP0275527A1 Method for the transmission and/or the use at the reception of additional information within a radio signal |
| 07/27/1988 | EP0275411A2 Process for the radio broadcasting of digital signals, particularly of computer programs and data, and process and apparatus for the reception of said signals |
| 07/27/1988 | EP0275328A1 Apparatus for collecting tv channel data and market research data |
| 07/12/1988 | US4757539 Apparatus and method for decoding an AM stereo broadcasting signal of an independent sideband system |
| 07/06/1988 | EP0273567A1 A transmission system |
| 07/05/1988 | US4755871 Control of rf answer pulses in a TV answer back system |
| 06/30/1988 | WO1988004862A1 Process for transmitting and/or evaluating on the receiver side information inside a radio signal |
| 06/29/1988 | CN87201489U Twelve-channel carrier telephone terminating machine with broadcast function |
| 06/21/1988 | US4752955 FM stereophonic system having improved compatibility in presence of multipath |
| 06/16/1988 | DE3642366A1 Compander system for electro-acoustic transmission paths |
| 06/15/1988 | EP0270630A1 Signal matching signal substitution. |
| 06/07/1988 | US4750167 Digital audio transmission system |
| 06/07/1988 | CA1237779A1 Transmitter/receiver for signals on the scramble unit |
| 06/02/1988 | WO1988004117A1 Process for transmitting digital audio-signals |
| 06/01/1988 | EP0269094A2 Control of rf answer pulses in a tv answer back system |
| 05/31/1988 | US4748689 Fiber-optic distribution system for broadband signals |
| 05/31/1988 | CA1237479A1 Am stereo receivers having platform motion protection |
| 05/31/1988 | CA1237478A1 Automatic multi-system am stereo receiver using existing single-system am stereo decoder ic |
| 05/26/1988 | DE3638922A1 Method for transmitting digitised stereophonic audio signals |
| 05/24/1988 | US4747160 Low power multi-function cellular television system |
| 05/24/1988 | US4747141 AM stereo signal decoder |
| 05/17/1988 | US4745468 System for evaluation and recording of responses to broadcast transmissions |
| 05/03/1988 | CA1236228A1 Methods for transmitting and receiving high quality audio programs and receiving device |
| 04/26/1988 | US4741048 One-way addressable system |
| 04/26/1988 | US4740834 Video program distribution |
| 04/19/1988 | US4739510 Direct broadcast satellite signal transmission system |
| 04/13/1988 | EP0263449A2 Method for broadcasting digital sound signals |
| 04/13/1988 | EP0263332A2 Receiver for radio traffic transmissions |
| 04/13/1988 | EP0263253A2 Method for broadcasting text messages on a sub-carrier associated with a radiophonic carrier frequency |
| 03/29/1988 | US4734764 Cable television system selectively distributing pre-recorded video and audio messages |
| 03/23/1988 | EP0260378A2 Modulation method |
| 03/22/1988 | US4733301 Signal matching signal substitution |
| 03/16/1988 | EP0259970A2 Radio receivers |
| 03/16/1988 | EP0259717A2 Method for selective information transmission to a user group, and device for carrying out this method |
| 03/01/1988 | CA1233551A1 Switch assembly and circuit |
| 02/25/1988 | WO1988000417A3 Method and installation for digital communication, particularly between and toward moving vehicles |
| 02/24/1988 | EP0256152A1 Method for generating a switching-signal in a broadcast or video receiver |
| 02/24/1988 | EP0256084A1 Method and apparatus for selectively blocking program channels |
| 02/11/1988 | WO1988001117A1 Apparatus for collecting tv channel data and market research data |
| 02/03/1988 | EP0254743A1 Pay-per-view catv system. |
| 02/02/1988 | US4723285 Methods of broadcasting and receiving high quality sound programs and a receiver device |
| 01/21/1988 | DE3723737A1 Reproduction device for stereophonic signals |
| 01/19/1988 | US4720873 Satellite audio broadcasting system |
| 01/14/1988 | WO1988000417A2 Method and installation for digital communication, particularly between and toward moving vehicles |
| 01/14/1988 | DE3623581C1 Community antenna system |
| 01/05/1988 | US4718109 Automatic synchronization system |
| 01/05/1988 | US4718106 Survey of radio audience |
| 12/29/1987 | US4716590 AM stereo transmission method and apparatus |
| 12/29/1987 | US4716410 CATV data transmission method |
| 12/23/1987 | CN87102461A Controlled blend for am stereo receivers |
| 12/17/1987 | WO1987007807A1 Signal matching signal substitution |
| 12/10/1987 | DE3619371A1 Method for multiplexing and demultiplexing plesiochronous digital signals |
| 12/08/1987 | US4712240 Transmission and reception of television broadcast in high-fidelity stereo audio |
| 12/01/1987 | US4710921 Digital signal transmitting system |
| 11/24/1987 | US4709402 Method of synchronizing radio transmitters for synchronous radio transmission |
| 11/24/1987 | US4709401 Method of setting radio transmitters for synchronous radio transmission |
| 11/19/1987 | DE3616276A1 Interference-resistant optical transmission system for studio and home studio systems |
| 11/17/1987 | US4707856 AM stereo receiver |
| 11/11/1987 | EP0245037A2 Signal identification |
| 11/03/1987 | US4704727 Low noise and distortion FM transmission system and method |
| 10/27/1987 | US4703476 Encoding of transmitted program material |
| 10/20/1987 | US4701904 Optical local area network employing microwave modulation techniques |
| 10/14/1987 | CN87202376U Common system for remote-controlled public-addiess and telephone |
| 10/13/1987 | US4700387 Broadcast system for scrambled programming signals |