Patents for H04W 84 - Network topologies (50,427) |
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09/28/1988 | EP0283683A2 Portable wireless communication systems and method |
09/27/1988 | CA1242537A1 Multiple access communications system |
09/13/1988 | US4771448 Private cellular system |
09/08/1988 | DE3706240A1 Method and radio paging system for selectively transmitting calls to mobile subscribers |
09/07/1988 | EP0281150A2 A paging system |
08/31/1988 | EP0279817A1 Automatic exchange system for maritime radio telephone |
08/30/1988 | US4768218 Radio key telephone system having a common signaling channel |
08/23/1988 | CA1241067A1 Pager |
07/19/1988 | US4759016 TDMA communication system having common local path medium and local time slot for intraoffice calls |
07/05/1988 | US4756018 Multiple access communication system having loop-check circuitry for switching intraoffice connections |
06/14/1988 | CA1238087A1 Queued community repeater communications systems |
05/31/1988 | US4748685 Remote squelch detect for use with a radio receiver |
05/31/1988 | US4748655 Portable telephones |
05/26/1988 | DE3639956A1 Radiotelephone |
05/25/1988 | EP0268375A2 Private cellular system |
05/03/1988 | CA1236165A1 Dispatch trunked radio system |
04/21/1988 | DE3735295A1 Verfahren zur uebermittlung von informationen in einem personenrufsystem Process for about communication of information in a paging system |
04/12/1988 | US4737975 Programmable system for interfacing a standard telephone set with a radio transceiver |
04/05/1988 | CA1234938A1 Duplex interconnect/dispatch trunked radio system |
03/29/1988 | US4734694 Pager |
03/29/1988 | CA1234601A1 Cellular mobile radio service telephone system |
03/15/1988 | US4731812 Installation with portable, wireless telephone sets |
02/25/1988 | WO1988001466A1 Automatic exchange system for maritime radio telephone |
02/02/1988 | US4723264 Signalling method for establishing trunked communication |
02/02/1988 | CA1232329A1 Communication system |
01/26/1988 | CA1232024A1 Multi-channel access (mca) radio telephone system |
01/12/1988 | CA1231385A1 Mobile telephone system for automatically paging absent mobile subscriber |
01/05/1988 | US4718108 Improved multiple site communication system |
12/29/1987 | US4716407 Trunked communication system true priority channel scan |
12/29/1987 | CA1230929A1 Multiple frequency message system |
12/17/1987 | EP0231259A4 Nationwide radio paging system. |
12/15/1987 | US4713808 Watch pager system and communication protocol |
12/08/1987 | US4712229 Multiple access radio telephone system selectively operating on full-duplex and half-duplex modes |
12/01/1987 | EP0232418A4 Scanning receiver for nationwide radio paging 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 |
11/11/1987 | EP0245077A2 TDMA communication system having common local path medium and local time slot for intraoffice calls |
11/11/1987 | EP0245024A2 Radio communication system with power saving disablement prior to call handling processes |
11/04/1987 | EP0243900A2 Radio key telephone system having a common signaling channel |
10/20/1987 | US4701944 Signalling system for trunked private calls |
10/19/1987 | EP0210181A4 Dispatch trunked radio system. |
10/14/1987 | EP0241287A2 Communication network capable of automatically informing a subscriber of occurrence of an idle channel |
10/14/1987 | EP0241228A2 Multiple access communication system having loop-check circuitry for switching intraoffice connections |
10/13/1987 | US4700375 Battery charging, reset, and data transfer system |
10/07/1987 | EP0240051A1 Radio communication system provided with beacon transmitters |
10/06/1987 | US4698805 Console interface for a trunked radio system |
09/30/1987 | EP0239093A2 Multiple access radio telephone system selectively operating on full-duplex and half-duplex modes |
09/15/1987 | CA1226927A1 Control of telecommunication switching systems |
09/09/1987 | EP0235371A1 Paging system and control method therefor |
09/09/1987 | EP0235195A1 Method for dynamically regrouping subscribers on a communications system |
09/08/1987 | US4692945 Dispatch trunked radio system |
08/19/1987 | EP0232418A1 Scanning receiver for nationwide radio paging system |
08/12/1987 | EP0231259A1 Nationwide radio paging system. |
08/11/1987 | US4686671 Cellular communication system operable with transmission pathfault |
07/21/1987 | US4682367 Mobile radio communications system with join feature |
07/01/1987 | EP0226610A1 Installation with portable, wireless telephone sets. |
06/23/1987 | US4675863 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels |
06/23/1987 | CA1223378A1 Multiple-access communications system |
06/09/1987 | US4672658 Spread spectrum wireless PBX |
06/09/1987 | US4672608 Multiple access communications system |
06/09/1987 | US4672601 Duplex interconnect/dispatch trunked radio system |
05/20/1987 | EP0222308A2 Radio communication system having means for avoiding signal collision |
05/19/1987 | CA1222079A1 Multiple access data communications controller for a time-division multiplex bus |
05/19/1987 | CA1222078A1 Time-division multiplex communications control system |
04/28/1987 | US4661972 Mobile telephone system for automatically paging absent mobile subscriber |
04/22/1987 | EP0219085A2 A spread spectrum wireless PBX |
04/21/1987 | US4659878 Method and apparatus for interference free communications between a remote handset and a host subscriber unit in a Cellular Radio Telephone System |
04/14/1987 | US4658435 Radio trunking system with transceivers and repeaters using special channel acquisition protocol |
04/14/1987 | US4658096 System for interfacing a standard telephone set with a radio transceiver |
04/13/1987 | EP0204813A4 Duplex interconnect/dispatch trunked radio system. |
03/31/1987 | CA1219915A1 Wide area coverage radio communications system and method |
03/12/1987 | WO1987001537A1 Method for dynamically regrouping subscribers on a communications system |
03/10/1987 | US4649567 Dispatch overdialing for inter-group and other added calling/called access to communications channels in a trunked radio communications system |
03/10/1987 | US4649385 Electronic locating system for persons receiving telephone calls |
03/04/1987 | EP0212761A2 Communications system |
03/04/1987 | EP0211849A1 Pager system and communication protocol. |
02/24/1987 | US4646345 Automatic unit ID for quasi-transmission trunked systems |
02/17/1987 | US4644347 Multiple frequency message system |
02/12/1987 | WO1987001005A1 Scanning receiver for nationwide radio paging system |
02/12/1987 | WO1987000994A1 Nationwide radio paging system |
02/04/1987 | EP0210181A1 Dispatch trunked radio system. |
01/29/1987 | DE3621990A1 Device for supplying transceivers inside a vehicle |
01/27/1987 | US4639914 Wireless PBX/LAN system with optimum combining |
01/06/1987 | US4635285 Communication system with voice priority for remote stations |
12/30/1986 | US4633463 Radio communication system |
12/23/1986 | CA1215746A1 General purpose data control terminal |
12/17/1986 | EP0204813A1 Duplex interconnect/dispatch trunked radio system. |
12/16/1986 | US4630263 Time-division multiplex communications control system |
12/03/1986 | EP0110888B1 A cordless telephone system |
12/02/1986 | US4626845 Subscriber validation system |
11/25/1986 | CA1214581A1 Ringing signal transmission system for radiotelephone system |
11/20/1986 | WO1986006915A1 Installation with portable, wireless telephone sets |
11/18/1986 | CA1214219A1 General purpose data control system |
11/18/1986 | CA1214218A1 Paging network |
10/15/1986 | EP0197556A2 Synchronization method for radio transmitters in a local e.g. nationwide paging network |
10/15/1986 | EP0128209B1 Method of setting radio transmitters for synchronous radio transmission |
10/15/1986 | CN86100949A Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels |
09/24/1986 | EP0195044A1 Radio trunking system with transceivers and repeaters using special channel acquisition protocol |
09/17/1986 | EP0128210B1 Method and apparatus for synchronizing radio transmitters for synchronous radio transmission |
09/16/1986 | US4612637 Multiple-access communications system |