TREA

John B. McPherson

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  • Old Lyme, CT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Envelope opening mechanism
    • Patent number 4,189,341
    • Issue date Feb 19, 1980
    • Thor Dahl, Inc.
    • John B. McPherson
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Envelope opening process
    • Patent number 4,082,603
    • Issue date Apr 4, 1978
    • Thor Dahl, Inc.
    • John B. McPherson
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES