TREA

Masami Shiraishi

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  • Tiba, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic toy blocks
    • Patent number 5,746,638
    • Issue date May 5, 1998
    • Stuff Mfg. Co., Ltd.
    • Masami Shiraishi
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Educational toy keyboard
    • Patent number 5,545,071
    • Issue date Aug 13, 1996
    • Stuff Co., Ltd.
    • Masami Shiraishi
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Educational drawing toy with sound-generating function
    • Patent number 5,501,601
    • Issue date Mar 26, 1996
    • Stuff Co., Ltd.
    • Masatoshi Todokoro
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS