TREA

Otake Tsutomu

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  • Suwa, JA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electrochromic display cell
    • Patent number 4,086,003
    • Issue date Apr 25, 1978
    • Kabushiki Kaisha Suwa Seikosha
    • Akihiko Kouchi
    • G02 - OPTICS
  • Information Patent Grant

    Electro-chromic display driving circuit
    • Patent number 4,057,739
    • Issue date Nov 8, 1977
    • Kabushiki Kaisha Suwa Seikosha
    • Tsutomu Otake
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Solar battery
    • Patent number 4,038,104
    • Issue date Jul 26, 1977
    • Kabushiki Kaisha Suwa Seikosha
    • Otake Tsutomu
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Electrochromic display device
    • Patent number 4,019,809
    • Issue date Apr 26, 1977
    • Kabushiki Kaisha Suwa Seikosha
    • Tsutomu Otake
    • G02 - OPTICS
  • Information Patent Grant

    Electro-chromic display device
    • Patent number 4,006,969
    • Issue date Feb 8, 1977
    • Kabushiki Kaisha Suwa Seikosha
    • Akihiko Kouchi
    • G02 - OPTICS
  • Information Patent Grant

    Battery charging circuit
    • Patent number 3,979,656
    • Issue date Sep 7, 1976
    • Kabushiki Kaisha Suwa Seikosha
    • Shuji Takeda
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER