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Yuji Oka

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  • Osaka-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Letterpress printing plate
    • Patent number 8,899,149
    • Issue date Dec 2, 2014
    • Sumita Company Ltd.
    • Yuji Oka
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Patents Applicationslast 30 patents

  • Information Patent Application

    Letterpress printing plate
    • Publication number 20090145316
    • Publication date Jun 11, 2009
    • Sumita Company Ltd.
    • Yuji Oka
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS