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Yuji Tanaka

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  • Kawasakishi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Key telephone call signalling circuit
    • Patent number 4,185,173
    • Issue date Jan 22, 1980
    • Nippon Tsu Shin Kogyo K.K.
    • Stephen E. Kerman
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents