TREA

David J. Tupman

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  • Mentor, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical communication apparatus for a vehicle
    • Patent number 4,691,385
    • Issue date Sep 1, 1987
    • Caterpillar Industrial Inc.
    • David J. Tupman
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Optical seat switch
    • Patent number 4,683,373
    • Issue date Jul 28, 1987
    • Caterpillar Industrial Inc.
    • David J. Tupman
    • B60 - VEHICLES IN GENERAL