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Yasumasa Yokoyama

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ink jet head having a protective layer with a controlled argon content
    • Patent number 5,946,013
    • Issue date Aug 31, 1999
    • Canon Kabushiki Kaisha
    • Suomi Kurihara
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Recording liquid
    • Patent number 4,632,703
    • Issue date Dec 30, 1986
    • Canon Kabushiki Kaisha
    • Shoji Koike
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Recording liquid
    • Patent number 4,599,112
    • Issue date Jul 8, 1986
    • Canon Kabushiki Kaisha
    • Yasumasa Yokoyama
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Recording liquid
    • Patent number 4,557,761
    • Issue date Dec 10, 1985
    • Canon Kabushiki Kaisha
    • Masatsune Kobayashi
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Method of forming color images
    • Patent number 4,505,749
    • Issue date Mar 19, 1985
    • Canon Kabushiki Kaisha
    • Kazue Kanekiyo
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS