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Yutaka Koizumi

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Two-dimensional positioning apparatus and method for measuring lase...
    • Patent number 6,603,562
    • Issue date Aug 5, 2003
    • Yokogawa Electric Corporation
    • Yutaka Ono
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Linear motor drive system
    • Patent number 5,742,136
    • Issue date Apr 21, 1998
    • Yokogawa Electric Corporation
    • Yutaka Ono
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Color display
    • Patent number 5,442,374
    • Issue date Aug 15, 1995
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    Image forming apparatus having a plurality of developing unit
    • Patent number 5,132,733
    • Issue date Jul 21, 1992
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Transfer medium separation in a recording apparatus
    • Patent number RE33844
    • Issue date Mar 10, 1992
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • 355 - Photocopying
  • Information Patent Grant

    Dual polarization transmission system
    • Patent number 5,075,697
    • Issue date Dec 24, 1991
    • NEC Corporation
    • Yutaka Koizumi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Color image forming apparatus
    • Patent number 4,987,428
    • Issue date Jan 22, 1991
    • Ricoh Company, Ltd.
    • Kazunori Bannai
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Color recording apparatus
    • Patent number 4,933,727
    • Issue date Jun 12, 1990
    • Ricoh Company, Ltd.
    • Kenichi Mizuma
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Direct drive motor system
    • Patent number 4,843,292
    • Issue date Jun 27, 1989
    • Yokogawa Electric Corporation
    • Yutaka Ono
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Endless belt
    • Patent number 4,772,253
    • Issue date Sep 20, 1988
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • B32 - LAYERED PRODUCTS
  • Information Patent Grant

    Color copying machine
    • Patent number 4,751,549
    • Issue date Jun 14, 1988
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Color copier
    • Patent number 4,746,950
    • Issue date May 24, 1988
    • Ricoh Company, Ltd.
    • Mitsuru Mamizuka
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Optical system for color copier
    • Patent number 4,742,371
    • Issue date May 3, 1988
    • Ricoh Company, Ltd.
    • Hideya Furuta
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Color copying apparatus
    • Patent number 4,690,542
    • Issue date Sep 1, 1987
    • Ricoh Company, Ltd.
    • Hideya Furuta
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Multiple quadrature-phase amplitude modulating system capable of re...
    • Patent number 4,675,619
    • Issue date Jun 23, 1987
    • NEC Corporation
    • Junichi Uchibori
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Method of and apparatus for producing duplicates in color
    • Patent number 4,664,501
    • Issue date May 12, 1987
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Method of controlling copying machine operation
    • Patent number 4,662,739
    • Issue date May 5, 1987
    • Ricoh Company, Ltd.
    • Yoshihiro Sakai
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Apparatus for recording color images
    • Patent number 4,610,529
    • Issue date Sep 9, 1986
    • Ricoh Co., Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Copying machine using a photosensitive belt
    • Patent number 4,592,644
    • Issue date Jun 3, 1986
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Transfer medium separation in a recording apparatus
    • Patent number 4,571,057
    • Issue date Feb 18, 1986
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Toner powder collection device
    • Patent number 4,505,577
    • Issue date Mar 19, 1985
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Process of exposing photosensitive member
    • Patent number 4,487,501
    • Issue date Dec 11, 1984
    • Ricoh Company, Ltd.
    • Shigeru Suzuki
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Electrophotographic apparatus
    • Patent number 4,348,098
    • Issue date Sep 7, 1982
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Multiple reproduction process and apparatus involves toned electrop...
    • Patent number 4,338,386
    • Issue date Jul 6, 1982
    • Ricoh Company, Ltd.
    • Yutaka Koizumi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Amplitude equalizer
    • Patent number 4,333,063
    • Issue date Jun 1, 1982
    • Nippon Electric Co., Ltd.
    • Toshihiko Ryu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Toner separation and recovery apparatus
    • Patent number 4,319,832
    • Issue date Mar 16, 1982
    • Ricoh Company, Ltd.
    • Koji Sakamoto
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Electrostatic copying machine
    • Patent number 4,272,180
    • Issue date Jun 9, 1981
    • Ricon Co., Ltd.
    • Toyokazu Satomi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Duplexing auto document feed for copying machine
    • Patent number 4,264,067
    • Issue date Apr 28, 1981
    • Ricoh Co., Ltd.
    • Gerald M. Adams
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Auto document feeder for use with duplex copying machine
    • Patent number 4,231,561
    • Issue date Nov 4, 1980
    • Ricoh Company, Ltd.
    • Tamaki Kaneko
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Duplex copying machine
    • Patent number 4,218,128
    • Issue date Aug 19, 1980
    • Ricoh Company, Ltd.
    • Toyokazu Satomi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

  • Information Patent Application

    XY STAGE
    • Publication number 20090014932
    • Publication date Jan 15, 2009
    • Yokogawa Electric Corporation
    • Mitsuhiro Nikaido
    • G05 - CONTROLLING REGULATING