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David E. Pendergraph

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  • Auburn, NY, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bulkhead door for a vessel
    • Patent number 7,213,528
    • Issue date May 8, 2007
    • Performance by Design International, Inc.
    • David E. Pendergraph
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Latch system for a watertight bulkhead door
    • Patent number 7,210,421
    • Issue date May 1, 2007
    • Performance by Design International, Inc.
    • David E. Pendergraph
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT