TREA

Daniel H. Pierce

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  • Birmingham, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Valve spring retainer-enlarged slots
    • Patent number 6,273,045
    • Issue date Aug 14, 2001
    • Daniel H. Pierce
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Valve spring retainer with skirt
    • Patent number 6,273,046
    • Issue date Aug 14, 2001
    • Daniel H. Pierce
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Bi-plastic self-locking valve spring retainer
    • Patent number 5,255,640
    • Issue date Oct 26, 1993
    • D.P.I.
    • Daniel H. Pierce
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Self-locking valve spring retainer
    • Patent number 5,226,229
    • Issue date Jul 13, 1993
    • Daniel H. Pierce
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Self-locking valve spring retainer
    • Patent number 5,143,351
    • Issue date Sep 1, 1992
    • Daniel H. Pierce
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Poppet valve spring retainer
    • Patent number 4,879,978
    • Issue date Nov 14, 1989
    • Daniel H. Pierce
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS