Tetsuo Yagyu

Person

  • Yokohama, JP

Patents Grantslast 30 patents

  • Information Patent Grant

    Ringtrip judging circuit

    • Patent number 5,684,874
    • Issue date Nov 4, 1997
    • Fujitsu Limited
    • Tetsuo Yagyu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE