TREA

Aastra Technologies Inc.

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  • CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Extension-in-use exclusion apparatus
    • Patent number 6,061,438
    • Issue date May 9, 2000
    • Aastra Technologies Inc
    • Francis N. Shen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Call waiting cancellation device
    • Patent number 5,546,451
    • Issue date Aug 13, 1996
    • Aastra Technologies Inc.
    • Anthony P. Shen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

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