TREA

Yasuhiko Watanabe

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  • Shizuoka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Thermosensitive recording material
    • Patent number 5,250,493
    • Issue date Oct 5, 1993
    • Ricoh Company, Ltd.
    • Takashi Ueda
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Thermosensitive recording material
    • Patent number 5,229,349
    • Issue date Jul 20, 1993
    • Ricoh Company, Ltd.
    • Norio Kurisu
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Thermosensitive recording material
    • Patent number 5,189,007
    • Issue date Feb 23, 1993
    • Ricoh Company, Ltd.
    • Hideo Aihara
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Thermosensitive recording material
    • Patent number 4,929,590
    • Issue date May 29, 1990
    • Ricoh Company, Ltd.
    • Keiichi Maruta
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS