TREA

R. Keith Harman

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  • Kanata, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Alternating current detector
    • Patent number 5,594,332
    • Issue date Jan 14, 1997
    • Iris Electronics Corporation
    • R. Keith Harman
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Dual leaky cables
    • Patent number 5,247,270
    • Issue date Sep 21, 1993
    • Senstar Corporation
    • R. Keith Harman
    • G08 - SIGNALLING
  • Information Patent Grant

    Phase shift divided leaky cable sensor
    • Patent number 4,994,789
    • Issue date Feb 19, 1991
    • Senstar Corporation
    • R. Keith Harman
    • G08 - SIGNALLING
  • Information Patent Grant

    Leaky cables
    • Patent number 4,987,394
    • Issue date Jan 22, 1991
    • Senstar Corporation
    • R. Keith Harman
    • G08 - SIGNALLING
  • Information Patent Grant

    Security system transmission line
    • Patent number 4,710,753
    • Issue date Dec 1, 1987
    • Senstar Security Systems Corporation
    • Brian G. Rich
    • G08 - SIGNALLING
  • Information Patent Grant

    Dual velocity leaky cable intrusion detector sensor
    • Patent number 4,612,536
    • Issue date Sep 16, 1986
    • Senstar Security Systems, Corporation
    • R. Keith Harman
    • G08 - SIGNALLING
  • Information Patent Grant

    Shunt transmission line for use in leaky coaxial cable system
    • Patent number 4,605,914
    • Issue date Aug 12, 1986
    • Senstar Security Systems Corp.
    • R. Keith Harman
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Intrusion detector
    • Patent number 4,562,428
    • Issue date Dec 31, 1985
    • Senstar Security Systems Corp.
    • R. Keith Harman
    • G08 - SIGNALLING
  • Information Patent Grant

    Perimeter surveillance system
    • Patent number 4,249,207
    • Issue date Feb 3, 1981
    • Computing Devices Company
    • R. Keith Harman
    • G06 - COMPUTING CALCULATING COUNTING