TREA

Katsuramaru Fujita

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  • Osaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Plastic optical fiber resistant to heat and humidity
    • Patent number 4,779,954
    • Issue date Oct 25, 1988
    • Sumitomo Chemical Company, Limited
    • Yoshiharu Tatsukami
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Plastic optical cable
    • Patent number 4,768,860
    • Issue date Sep 6, 1988
    • Sumitomo Chemical Co., Ltd.
    • Yoshiharu Tatsukami
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Plastic optical fiber
    • Patent number 4,758,067
    • Issue date Jul 19, 1988
    • Sumitomo Chemical Co., Ltd.
    • Yoshiharu Tatsukami
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL