TREA

Hiroyuki Tsujinaka deceased

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  • late of Kobe, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hollow solid golf ball
    • Patent number 6,200,231
    • Issue date Mar 13, 2001
    • Sumitomo Rubber Industries, Ltd.
    • Keiji Moriyama
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Hollow golf ball
    • Patent number 5,944,621
    • Issue date Aug 31, 1999
    • Sumitomo Rubber Industries, Ltd.
    • Hiroyuki Tsujinaka
    • A63 - SPORTS GAMES AMUSEMENTS