TREA

Sumiyuki Ishigami

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Temperature measurement device
    • Patent number 4,986,670
    • Issue date Jan 22, 1991
    • Agency of Industrial Science and Technology
    • Futoshi Uchiyama
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Quartz unit
    • Patent number 4,550,475
    • Issue date Nov 5, 1985
    • Tokyo Denpa Kabushiki Kaisha
    • Sumiyuki Ishigami
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Y-Shaped support for piezoelectric resonator
    • Patent number 4,486,681
    • Issue date Dec 4, 1984
    • Tokyo Denpa Kabushiki Kaisha
    • Sumiyuki Ishigami
    • H03 - BASIC ELECTRONIC CIRCUITRY