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Jun Hirakawa

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  • Kanagawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Photographic lens system and electronic imaging device using the same
    • Patent number 7,808,723
    • Issue date Oct 5, 2010
    • Hoya Corporation
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Fisheye lens system and a fisheye zoom lens system
    • Patent number 7,317,581
    • Issue date Jan 8, 2008
    • PENTAX Corporation
    • Takayuki Ito
    • G02 - OPTICS
  • Information Patent Grant

    Wide-angle lens system
    • Patent number 7,116,499
    • Issue date Oct 3, 2006
    • PENTAX Corporation
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Adapter having a tilt and shift mechanism
    • Patent number 6,318,912
    • Issue date Nov 20, 2001
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Tetsuji Shono
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    View finder
    • Patent number 6,002,887
    • Issue date Dec 14, 1999
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Toru Chiba
    • G02 - OPTICS
  • Information Patent Grant

    Soft focus lens
    • Patent number 5,822,132
    • Issue date Oct 13, 1998
    • Asahi Kogaku Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Super wide angle zoom lens
    • Patent number 5,724,193
    • Issue date Mar 3, 1998
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Reflection-type compound optical elements
    • Patent number 5,717,532
    • Issue date Feb 10, 1998
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Toru Chiba
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Inner focus type telephoto zoom lens
    • Patent number 5,572,276
    • Issue date Nov 5, 1996
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Two-group zoom lens
    • Patent number 5,546,232
    • Issue date Aug 13, 1996
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Telephoto zoom lens system
    • Patent number 5,448,412
    • Issue date Sep 5, 1995
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Koichi Maruyama
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens
    • Patent number 5,264,965
    • Issue date Nov 23, 1993
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Wide-angle lens system
    • Patent number 5,233,474
    • Issue date Aug 3, 1993
    • Asahi Kogaku Kogyo K.K.
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Large aperture, medium telephoto lens system
    • Patent number 5,172,274
    • Issue date Dec 15, 1992
    • Asahi Kogaku Kogyo K.K.
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Telephoto zoom lens system
    • Patent number 5,061,053
    • Issue date Oct 29, 1991
    • Asahi Kogaku Kogyo K.K.
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Wide-angle lens system of a retrofocus type
    • Patent number 4,934,797
    • Issue date Jun 19, 1990
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Telephoto lens system
    • Patent number 4,904,070
    • Issue date Feb 27, 1990
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Telephoto zoom lens system
    • Patent number 4,836,663
    • Issue date Jun 6, 1989
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Wide angle reading lens system
    • Patent number 4,781,449
    • Issue date Nov 1, 1988
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS
  • Information Patent Grant

    Wide-angle seven-element lens system
    • Patent number 4,747,676
    • Issue date May 31, 1988
    • Asashi Kogaku Kogyo Kabushiki Kaisha
    • Jun Hirakawa
    • G02 - OPTICS

Patents Applicationslast 30 patents