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Showing 1 to 20 of 411 results

PATENT /PUB No. Country Patent Title Patent Owner Filing Date Issue/Pub Date Status
6529572 US Network independent clocking in a telecommunication system Apr 5, 1999 Mar 4, 2003 Expired
5917315 US Receiver for spectrum analysis Sep 18, 1997 Jun 29, 1999 Expired
6157643 US Switching fabric May 4, 1999 Dec 5, 2000 Expired
5551056 US Method for securing the operation of a telecommunications network in a cellular radio system and a base station arrangement Aug 16, 1994 Aug 27, 1996 Expired
5936999 US Receiver and method for generating spreading codes in a receiver Oct 10, 1996 Aug 10, 1999 Expired
5790528 US Semi-hard handoff in a cellular telecommunications systems Dec 13, 1996 Aug 4, 1998 Expired
5504671 US Radio system combiner filter control system wherein plural auxiliary cards automatically obtain correct address from motherboard upon being inserted in respective auxiliary card connectors Aug 15, 1994 Apr 2, 1996 In Force
6233569 US Event recording in a service database system Feb 16, 1999 May 15, 2001 Expired
6167079 US Method for identifying data transmission rate, and a receiver Aug 28, 1997 Dec 26, 2000 Expired
5418787 US Signalling method for a radio system Dec 10, 1993 May 23, 1995 Expired
5088112 US AN INTERFACE UNIT Nov 21, 1989 Feb 11, 1992 Expired
5604728 US Method for testing a transceiver, and base station of a time-divisional radicommunication system Feb 9, 1995 Feb 18, 1997 In Force
5668804 US FOR A DIGITAL TIME DIVISION MULTIPLE ACCESS RADIO NETWORK Jan 5, 1996 Sep 16, 1997 In Force
6171039 US Locking mechanism for connector May 11, 1999 Jan 9, 2001 Expired
6121927 US Determination of terminal location in a radio system Apr 27, 1999 Sep 19, 2000 Expired
6321066 US Method and apparatus for directional radio communication Dec 22, 1998 Nov 20, 2001 Expired
5802457 US Method for realizing ambience listening, and radio unit Apr 19, 1996 Sep 1, 1998 Expired
6272348 US Method for channel allocation Sep 23, 1999 Aug 7, 2001 Expired
6003031 US Method and system of providing subscriber-specified service by an intelligent network Oct 6, 1997 Dec 14, 1999 In Force
6225888 US Authentication between communicating parties in a telecommunications network Jun 8, 1999 May 1, 2001 In Force

Showing 1 to 20 of 411 results

*Note: Documents with disabled checkboxes are ancillary ones, so these cannot be added to portfolio.