TREA

David N. Lockwood

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  • Burnaby, B.C., CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drill bit sharpener
    • Patent number 4,916,867
    • Issue date Apr 17, 1990
    • David N. Lockwood
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Building panels
    • Patent number 4,862,652
    • Issue date Sep 5, 1989
    • David N. Lockwood
    • E04 - BUILDING
  • Information Patent Grant

    Building panels
    • Patent number 4,776,139
    • Issue date Oct 11, 1988
    • David N. Lockwood
    • E04 - BUILDING
  • Information Patent Grant

    Building panels
    • Patent number 4,672,780
    • Issue date Jun 16, 1987
    • David N. Lockwood
    • E04 - BUILDING