TREA

Stephen R. Christensen

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  • Nashua, NH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vibratory interference sensor
    • Patent number 4,816,727
    • Issue date Mar 28, 1989
    • University of Lowell
    • G. Dudley Shepard
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Vibratory interference sensor
    • Patent number 4,804,896
    • Issue date Feb 14, 1989
    • University of Lowell
    • G. Dudley Shepard
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS