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Siegfried F. Gruber

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  • Chicago, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Multiple stage shaving die
    • Patent number 5,105,697
    • Issue date Apr 21, 1992
    • Siegfried F. Gruber
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Shaping die
    • Patent number 4,970,923
    • Issue date Nov 20, 1990
    • Siegfried F. Gruber
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...