TREA

Chiuichi Sodeyama

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  • Yokohama, JA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mixer circuit
    • Patent number 4,031,472
    • Issue date Jun 21, 1977
    • Hitachi, Ltd.
    • Keiro Shinkawa
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Rat-race mixer circuit
    • Patent number 4,008,438
    • Issue date Feb 15, 1977
    • Hitachi, Ltd.
    • Keiro Shinkawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE