TREA

Springfield Tool & Die, Inc.

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  • Dearborn, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Piercing apparatus
    • Patent number 4,128,028
    • Issue date Dec 5, 1978
    • Springfield Tool & Die, Inc.
    • Jan C. Knibbe
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Piercing apparatus
    • Patent number 4,038,894
    • Issue date Aug 2, 1977
    • Springfield Tool & Die, Inc.
    • Jan C. Knibbe
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Piercing apparatus
    • Patent number 3,991,641
    • Issue date Nov 16, 1976
    • Springfield Tool & Die, Inc.
    • Jan C. Knibbe
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

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