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Richard H. Ludwig

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  • West Caldwell, NJ, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Elevator system leveling safeguard control and method
    • Patent number 4,785,914
    • Issue date Nov 22, 1988
    • Westinghouse Electric Corp.
    • Jeffrey W. Blain
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Elevator system
    • Patent number 4,648,488
    • Issue date Mar 10, 1987
    • Westinghouse Electric Corp.
    • Matthew Martin
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Elevator system
    • Patent number 4,638,889
    • Issue date Jan 27, 1987
    • Westinghouse Electric Corp.
    • Richard H. Ludwig
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Elevator system
    • Patent number 4,463,833
    • Issue date Aug 7, 1984
    • Westinghouse Electric Corp.
    • Richard H. Ludwig
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Elevator system
    • Patent number 4,436,185
    • Issue date Mar 13, 1984
    • Westinghouse Electric Corp.
    • Richard H. Ludwig
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Elevator system
    • Patent number 4,317,506
    • Issue date Mar 2, 1982
    • Westinghouse Electric Corp.
    • Wing C. Quan
    • B66 - HOISTING LIFTING HAULING