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Hidemasa Yamakawa

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  • Nagano-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Projector
    • Patent number 8,248,545
    • Issue date Aug 21, 2012
    • Seiko Epson Corporation
    • Hidemasa Yamakawa
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Projector
    • Patent number 7,390,095
    • Issue date Jun 24, 2008
    • Seiko Epson Corporation
    • Kanji Yoshida
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Projector
    • Patent number 7,329,007
    • Issue date Feb 12, 2008
    • Seiko Epson Corporation
    • Joji Karasawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Light-modulating projector
    • Patent number 7,267,443
    • Issue date Sep 11, 2007
    • Seiko Epson Corporation
    • Hidemasa Yamakawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Lighting unit and projector including the same
    • Patent number 7,216,991
    • Issue date May 15, 2007
    • Seiko Epson Corporation
    • Hidemasa Yamakawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Projector
    • Patent number 7,156,523
    • Issue date Jan 2, 2007
    • Seiko Epson Corporation
    • Hidemasa Yamakawa
    • G02 - OPTICS
  • Information Patent Grant

    Projector with a micro lens array
    • Patent number 7,123,311
    • Issue date Oct 17, 2006
    • Seiko Epson Corporation
    • Hidemasa Yamakawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Rear projection type projector and its method of use
    • Patent number 7,086,743
    • Issue date Aug 8, 2006
    • Seiko Epson Corporation
    • Hidemasa Yamakawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Projector comprising a polarizer attached to a transmissive flexibl...
    • Patent number 6,619,800
    • Issue date Sep 16, 2003
    • Seiko Epson Corporation
    • Takeshi Takezawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Illumination optical system and projector using the same
    • Patent number 6,491,397
    • Issue date Dec 10, 2002
    • Seiko Epson Corporation
    • Yasunori Ogawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Projector
    • Patent number 6,481,850
    • Issue date Nov 19, 2002
    • Seiko Epson Corporation
    • Takeshi Takezawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    PROJECTOR
    • Publication number 20110043712
    • Publication date Feb 24, 2011
    • SEIKO EPSON CORPORATION
    • Hidemasa YAMAKAWA
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Application

    Projector
    • Publication number 20060152681
    • Publication date Jul 13, 2006
    • SEIKO EPSON CORPORATION
    • Hidemasa Yamakawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Projector
    • Publication number 20060077357
    • Publication date Apr 13, 2006
    • SEIKO EPSON CORPORATION
    • Kanji Yoshida
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Projector
    • Publication number 20060072209
    • Publication date Apr 6, 2006
    • SEIKO EPSON CORPORATION
    • Joji Karasawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Projector
    • Publication number 20060050396
    • Publication date Mar 9, 2006
    • SEIKO EPSON CORPORATION
    • Hidemasa Yamakawa
    • G02 - OPTICS
  • Information Patent Application

    Lighting unit and projector including the same
    • Publication number 20050052868
    • Publication date Mar 10, 2005
    • SEIKO EPSON CORPORATION
    • Hidemasa Yamakawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Rear projection type projector and its method of use
    • Publication number 20050012906
    • Publication date Jan 20, 2005
    • Hidemasa Yamakawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Projector
    • Publication number 20040075778
    • Publication date Apr 22, 2004
    • SEIKO EPSON CORPORATION
    • Hidemasa Yamakawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Illumination optical system and projector using the same
    • Publication number 20020018150
    • Publication date Feb 14, 2002
    • SEIKO EPSON CORPORATION
    • Yasunori Ogawa
    • G02 - OPTICS