TREA

David M. Britz

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  • Rumson, NJ, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Calling card telephone
    • Patent number D283890
    • Issue date May 20, 1986
    • AT&T Technologies, Inc.
    • David M. Britz
    • D14 - Recording, communication, or information retrieval equipment