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David A. Fisher

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  • Essex, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fault location in optical communication systems
    • Patent number 6,075,628
    • Issue date Jun 13, 2000
    • Nortel Networks Corporation
    • David Anthony Fisher
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Telecommunications system
    • Patent number 5,537,241
    • Issue date Jul 16, 1996
    • Northern Telecom Limited
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telecommunications systems
    • Patent number 5,528,596
    • Issue date Jun 18, 1996
    • Northern Telecom Limited
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telecommunications systems
    • Patent number 5,444,710
    • Issue date Aug 22, 1995
    • Northern Telecom Limited
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Sequence synchronization
    • Patent number 5,321,754
    • Issue date Jun 14, 1994
    • Northern Telecom Limited
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Sequence synchronisation
    • Patent number 5,237,593
    • Issue date Aug 17, 1993
    • STC, plc
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Binary for penternary (five-level) encoding system
    • Patent number 5,191,330
    • Issue date Mar 2, 1993
    • Northern Telecom Limited
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Data transmission system
    • Patent number 4,910,750
    • Issue date Mar 20, 1990
    • STC plc
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Data transmission system
    • Patent number 4,878,232
    • Issue date Oct 31, 1989
    • STC PLC
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Data transmission system
    • Patent number 4,766,589
    • Issue date Aug 23, 1988
    • STC PLC
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Echo canceller
    • Patent number 4,539,675
    • Issue date Sep 3, 1985
    • International Standard Electric Corporation
    • David A. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE