TREA

David John Sheffield

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  • Hemel Hempstead, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Blind riveting machine
    • Patent number 4,368,838
    • Issue date Jan 18, 1983
    • Aerpat A.G.
    • David J. Sheffield
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Hydraulically operated riveting apparatus
    • Patent number 4,116,036
    • Issue date Sep 26, 1978
    • Aerpat A.G.
    • David John Sheffield
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...