TREA

Thor Dahl, Inc.

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Organization

  • New York, NY, US
Organizations

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

    Apparatus for applying chemicals to envelopes
    • Patent number 4,106,432
    • Issue date Aug 15, 1978
    • Thor Dahl, Inc.
    • William H. Gunther
    • B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
  • 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
  • Information Patent Grant

    Envelope opening machine
    • Patent number 4,069,011
    • Issue date Jan 17, 1978
    • Thor Dahl, Inc.
    • William H. Gunther
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES