TREA

Zenrou Hayashi

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  • Osaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical display
    • Patent number 6,757,087
    • Issue date Jun 29, 2004
    • Matsushita Electric Industrial Co., Ltd.
    • Yoshinao Taketomi
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    Optical display apparatus
    • Patent number 6,377,370
    • Issue date Apr 23, 2002
    • Matsushita Electric Industrial Co., Ltd.
    • Yoshinao Taketomi
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS