TREA

Takuo Koyama

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pattern display apparatus
    • Patent number 4,408,197
    • Issue date Oct 4, 1983
    • Hitachi, Ltd.
    • Shigeru Komatsu
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    Memory selecting system
    • Patent number 4,388,707
    • Issue date Jun 14, 1983
    • Hitachi, Ltd.
    • Shigeru Komatsu
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Digital data processing device
    • Patent number 4,368,461
    • Issue date Jan 11, 1983
    • Hitachi, Ltd.
    • Shigeru Komatsu
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS