TREA

David W. Duehren

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  • Belmont, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fax message system
    • Patent number 5,488,651
    • Issue date Jan 30, 1996
    • Brooktrout Technology, Inc.
    • Eric R. Giler
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Fax message system
    • Patent number 5,291,546
    • Issue date Mar 1, 1994
    • Brooktrout Technology, Inc.
    • Eric R. Giler
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Control of electronic information delivery
    • Patent number 4,918,722
    • Issue date Apr 17, 1990
    • Brooktrout Technology, Inc.
    • David W. Duehren
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE