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Yoshikazu Doi

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  • Omiya, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Objective optical system for endoscope
    • Patent number 4,598,980
    • Issue date Jul 8, 1986
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G02 - OPTICS
  • Information Patent Grant

    Holographic endoscope
    • Patent number 4,589,723
    • Issue date May 20, 1986
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Zoom lens system
    • Patent number 4,560,254
    • Issue date Dec 24, 1985
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G02 - OPTICS
  • Information Patent Grant

    Wide angle zoom lens
    • Patent number 4,484,799
    • Issue date Nov 27, 1984
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G02 - OPTICS
  • Information Patent Grant

    Rear stop type lens system
    • Patent number 4,298,252
    • Issue date Nov 3, 1981
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G02 - OPTICS
  • Information Patent Grant

    Rear stop type zoom lens
    • Patent number 4,294,521
    • Issue date Oct 13, 1981
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system with a movable distortion-correcting element
    • Patent number 4,245,891
    • Issue date Jan 20, 1981
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system
    • Patent number 4,195,912
    • Issue date Apr 1, 1980
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G02 - OPTICS
  • Information Patent Grant

    Inverted telephoto type super-wide angle lens
    • Patent number 4,158,482
    • Issue date Jun 19, 1979
    • Fuji Photo Optical Co., Ltd.
    • Yoshikazu Doi
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens system
    • Patent number 4,149,774
    • Issue date Apr 17, 1979
    • Fuji Photo Optical Co., Ltd.
    • Nagayoshi Hirano
    • G02 - OPTICS