TREA

Hiroji Shoyama

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Self-oscillating mixer circuit
    • Patent number 4,219,779
    • Issue date Aug 26, 1980
    • Hitachi, Ltd.
    • Keiro Shinkawa
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Mixer circuit arrangement
    • Patent number 4,211,977
    • Issue date Jul 8, 1980
    • Hitachi, Ltd.
    • Keiro Shinkawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    SHF band oscillator circuit using FET
    • Patent number 4,187,476
    • Issue date Feb 5, 1980
    • Hitachi, Ltd.
    • Keiro Shinkawa
    • H03 - BASIC ELECTRONIC CIRCUITRY