TREA

Frank W. Campbell

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  • Brooklyn Center, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Window operator
    • Patent number RE34287
    • Issue date Jun 22, 1993
    • Truth Division of SPX Corporation
    • John M. Berner
    • 049 - Movable or removable closures
  • Information Patent Grant

    Shielded enclosure for an electronic device
    • Patent number 5,162,610
    • Issue date Nov 10, 1992
    • Control Systems, Inc.
    • Frank Clifton
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Window operator
    • Patent number 4,945,678
    • Issue date Aug 7, 1990
    • Truth Incorporated
    • John M. Berner
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES