TREA

Shuzo Watanabe

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  • Kawasaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for manufacturing thermionic cathode
    • Patent number 4,168,565
    • Issue date Sep 25, 1979
    • Denki Kagaku Kogyo Kabushiki Kaisha
    • Masaji Ishii
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Thermionic cathode
    • Patent number 4,137,476
    • Issue date Jan 30, 1979
    • Denki Kagaku Kogyo Kabushiki Kaisha
    • Masaji Ishii
    • H01 - BASIC ELECTRIC ELEMENTS