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Hirofumi Koshi

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  • Chiba-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Liquid crystal display control device
    • Patent number 6,219,020
    • Issue date Apr 17, 2001
    • Hitachi, Ltd.
    • Tsutomu Furuhashi
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    Liquid crystal display device
    • Patent number 6,088,014
    • Issue date Jul 11, 2000
    • Hitachi, Ltd.
    • Tsutomu Furuhashi
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS