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Brian J. Armstrong

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  • Seal Beach, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hard facing for milled tooth rock bits
    • Patent number 4,944,774
    • Issue date Jul 31, 1990
    • Smith International, Inc.
    • Madapusi K. Keshavan
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Hard facing for milled tooth rock bits
    • Patent number 4,836,307
    • Issue date Jun 6, 1989
    • Smith International, Inc.
    • Madapusi K. Keshavan
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR