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Harold F. Armstrong

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  • Milford, NH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Broach and process of manufacturing a broach
    • Patent number 5,242,251
    • Issue date Sep 7, 1993
    • Cutting Tool Technologies, Inc.
    • Harold F. Armstrong
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Inserted blade end mill
    • Patent number 4,357,122
    • Issue date Nov 2, 1982
    • The O.K. Tool Company, Inc.
    • Thomas Hollis
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR