TREA

Minefuji Nobutaka

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Patents Grantslast 30 patents

  • Information Patent Grant

    Imaging optical system
    • Patent number 7,307,799
    • Issue date Dec 11, 2007
    • PENTAX Corporation
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system
    • Patent number 6,906,868
    • Issue date Jun 14, 2005
    • PENTAX Corporation
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Zoom len system
    • Patent number 6,781,768
    • Issue date Aug 24, 2004
    • PENTAX Corporation
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system
    • Patent number 6,597,513
    • Issue date Jul 22, 2003
    • PENTAX Corporation
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Stereoscopic microscope including zoom and relay optical systems
    • Patent number 6,396,627
    • Issue date May 28, 2002
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Satoru Tachihara
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system
    • Patent number 6,344,931
    • Issue date Feb 5, 2002
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Photographic lens
    • Patent number 6,181,487
    • Issue date Jan 30, 2001
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Shuji Yoneyama
    • G02 - OPTICS
  • Information Patent Grant

    Photographic lens
    • Patent number 6,181,488
    • Issue date Jan 30, 2001
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Shuji Yoneyama
    • G02 - OPTICS
  • Information Patent Grant

    Projector and focusing method therein
    • Patent number 5,645,334
    • Issue date Jul 8, 1997
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Yasuyuki Tejima
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Projection lens assembly and projector
    • Patent number 5,600,488
    • Issue date Feb 4, 1997
    • Casio Computer Co., Ltd.
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Variable power projection lens
    • Patent number 5,504,625
    • Issue date Apr 2, 1996
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Pupil conjugate-coupling device in projecting optical system
    • Patent number 5,442,413
    • Issue date Aug 15, 1995
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Yasuyuki Tejima
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system
    • Patent number 5,363,243
    • Issue date Nov 8, 1994
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Ito Takayuki
    • G02 - OPTICS
  • Information Patent Grant

    Projector
    • Patent number 5,305,029
    • Issue date Apr 19, 1994
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Kazushi Yoshida
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Optical device
    • Patent number 5,291,241
    • Issue date Mar 1, 1994
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Hiroyuki Hirano
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Apparatus for combining and projecting images
    • Patent number 5,283,599
    • Issue date Feb 1, 1994
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Yasuyuki Tejima
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Magnifying projecting lens
    • Patent number 5,278,698
    • Issue date Jan 11, 1994
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Takashi Iizuka
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system
    • Patent number 5,260,833
    • Issue date Nov 9, 1993
    • Asahi Kogaku Kogyo K.K.
    • Takayuki Ito
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system
    • Patent number 5,155,629
    • Issue date Oct 13, 1992
    • Asahi Kogaku Kogyo K.K.
    • Takayuki Ito
    • G02 - OPTICS
  • Information Patent Grant

    Shading board for copying apparatus
    • Patent number 5,066,987
    • Issue date Nov 19, 1991
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Nobutaka Minefuji
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Copying lens system
    • Patent number 5,015,079
    • Issue date May 14, 1991
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Color separating optical apparatus
    • Patent number 4,964,696
    • Issue date Oct 23, 1990
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Minoru Suzuki
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Telecentric projection lens system
    • Patent number 4,913,540
    • Issue date Apr 3, 1990
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens for use in copying
    • Patent number 4,832,465
    • Issue date May 23, 1989
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Yasunori Arai
    • G02 - OPTICS
  • Information Patent Grant

    Color zoom copying apparatus
    • Patent number 4,825,252
    • Issue date Apr 25, 1989
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Minoru Suzuki
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Copying zoom lens
    • Patent number 4,813,773
    • Issue date Mar 21, 1989
    • Asahi Kogaku Kogyo Kabushiki Kaisha
    • Nobutaka Minefuji
    • G02 - OPTICS

Patents Applicationslast 30 patents

  • Information Patent Application

    Imaging optical system
    • Publication number 20050253952
    • Publication date Nov 17, 2005
    • PENTAX CORPORATION
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Application

    Multiple-focal imaging device, and a mobile device having the multi...
    • Publication number 20040240052
    • Publication date Dec 2, 2004
    • PENTAX CORPORATION
    • Nobutaka Minefuji
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Zoom lens system
    • Publication number 20040012859
    • Publication date Jan 22, 2004
    • PENTAX CORPORATION
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Application

    Zoom len system
    • Publication number 20030123156
    • Publication date Jul 3, 2003
    • PENTAX CORPORATION
    • Nobutaka Minefuji
    • G02 - OPTICS
  • Information Patent Application

    Zoom lens system
    • Publication number 20030043474
    • Publication date Mar 6, 2003
    • ASAHIKOGAKU KOGYO KABUSHIKI KAISHA
    • Nobutaka Minefuji
    • G02 - OPTICS