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Yutaka Iizuka

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Zoom lens comprising two groups of lenses
    • Patent number 4,770,509
    • Issue date Sep 13, 1988
    • Nippon Kogaku K.K.
    • Kiyoshi Hayashi
    • G02 - OPTICS
  • Information Patent Grant

    Catadioptric telephoto lens
    • Patent number 4,666,259
    • Issue date May 19, 1987
    • Nippon Kogaku K.K.
    • Yutaka Iizuka
    • G02 - OPTICS
  • Information Patent Grant

    Focusing screen
    • Patent number 4,632,531
    • Issue date Dec 30, 1986
    • Nippon Kogaku K.K.
    • Yutaka Ichihara
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Focusing screen of a camera
    • Patent number 4,519,686
    • Issue date May 28, 1985
    • Nippon Kogaku K.K.
    • Yasutomo Seki
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Albada finder device
    • Patent number 4,441,802
    • Issue date Apr 10, 1984
    • Nippon Kogaku K.K.
    • Yutaka Iizuka
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Lenses capable of close-up photography
    • Patent number 4,437,734
    • Issue date Mar 20, 1984
    • Nippon Kogaku K.K.
    • Yutaka Iizuka
    • G02 - OPTICS
  • Information Patent Grant

    Zoom lens
    • Patent number 4,398,807
    • Issue date Aug 16, 1983
    • Nippon Kogaku K.K.
    • Yutaka Iizuka
    • G02 - OPTICS
  • Information Patent Grant

    Focus detecting optical device of a single lens reflex camera
    • Patent number 4,357,086
    • Issue date Nov 2, 1982
    • Nippon Kogaku K.K.
    • Jun Shimomura
    • G02 - OPTICS
  • Information Patent Grant

    Inverted Galilean finder
    • Patent number 4,348,090
    • Issue date Sep 7, 1982
    • Nippon Kogaku K.K.
    • Yutaka Iizuka
    • G02 - OPTICS
  • Information Patent Grant

    Indicator device in an inverted Galilean finder
    • Patent number 4,348,091
    • Issue date Sep 7, 1982
    • Nippon Kogaku K.K.
    • Yutaka Iizuka
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Viewfinder display in a single lens reflex camera
    • Patent number 4,231,649
    • Issue date Nov 4, 1980
    • Nippon Kogaku K.K.
    • Makoto Kimura
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Zoom lens system
    • Patent number 4,189,213
    • Issue date Feb 19, 1980
    • Nippon Kogaku K.K.
    • Yutaka Iizuka
    • G02 - OPTICS