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Yoshitaro Ishii

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  • Hitachi-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electrophotographic image forming system
    • Patent number 6,661,994
    • Issue date Dec 9, 2003
    • Hitachi, Ltd.
    • Yoshio Ohuchi
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Image forming apparatus
    • Patent number 6,549,731
    • Issue date Apr 15, 2003
    • Hitachi, Ltd.
    • Tomofumi Yoshida
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Developing device, developing method, and an image forming apparatus
    • Patent number 6,125,250
    • Issue date Sep 26, 2000
    • Hitachi, Ltd.
    • Keiji Kamio
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Vacuum cleaner
    • Patent number 5,381,584
    • Issue date Jan 17, 1995
    • Hitachi, Ltd.
    • Fumio Jyoraku
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Method and apparatus for operating vacuum cleaner
    • Patent number 5,294,872
    • Issue date Mar 15, 1994
    • Hitachi, Ltd.
    • Haruo Koharagi
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Vacuum cleaner with fuzzy logic control
    • Patent number 5,243,732
    • Issue date Sep 14, 1993
    • Hitachi, Ltd.
    • Haruo Koharagi
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Method and apparatus for operating vacuum cleaner
    • Patent number RE34286
    • Issue date Jun 22, 1993
    • Hitachi, Ltd.
    • Hisanori Toyoshima
    • 015 - Brushing, scrubbing, and general cleaning
  • Information Patent Grant

    Vacuum cleaner
    • Patent number 5,216,778
    • Issue date Jun 8, 1993
    • Hitachi, Ltd.
    • Naruhiko Suzuki
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Motor control apparatus for an electric vacuum cleaner
    • Patent number 5,166,585
    • Issue date Nov 24, 1992
    • Hitachi, Ltd.
    • Haruo Koharagi
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Vacuum cleaner and method for operating the same
    • Patent number 5,155,885
    • Issue date Oct 20, 1992
    • Hitachi, Ltd.
    • Fumio Jyouraku
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Electric blower having improved return passage for discharged air flow
    • Patent number 5,110,266
    • Issue date May 5, 1992
    • Hitachi, Ltd.
    • Hisanori Toyoshima
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Method and apparatus for operating vacuum cleaner
    • Patent number 5,075,607
    • Issue date Dec 24, 1991
    • Hitachi, Ltd.
    • Haruo Koharagi
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Hose fixture device
    • Patent number 5,042,844
    • Issue date Aug 27, 1991
    • Hitachi, Ltd.
    • Akira Iida
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Vacuum cleaner
    • Patent number 5,027,469
    • Issue date Jul 2, 1991
    • Hitachi, Ltd.
    • Hisanori Toyoshima
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Upright-type electric vacuum cleaner
    • Patent number 5,003,663
    • Issue date Apr 2, 1991
    • Hitachi, Ltd.
    • Masao Sunagawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Method and apparatus for operating vacuum cleaner
    • Patent number 4,983,895
    • Issue date Jan 8, 1991
    • Hitachi, Ltd.
    • Haruo Koharagi
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Method and apparatus for operating vacuum cleaner
    • Patent number 4,958,406
    • Issue date Sep 25, 1990
    • Hitachi, Ltd.
    • Hisanori Toyoshima
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Vacuum cleaner
    • Patent number 4,955,105
    • Issue date Sep 11, 1990
    • Hitachi, Ltd.
    • Masao Sunagawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Electrical appliance
    • Patent number 4,912,593
    • Issue date Mar 27, 1990
    • Hitachi, Ltd.
    • Akira Iwao
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Upright-type electric vacuum cleaner
    • Patent number 4,905,341
    • Issue date Mar 6, 1990
    • Hitachi, Ltd.
    • Masao Sunagawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Upright-type electric vacuum cleaner
    • Patent number 4,893,376
    • Issue date Jan 16, 1990
    • Hitachi, Ltd.
    • Masao Sunagawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Method and apparatus for operating vacuum cleaner
    • Patent number 4,880,474
    • Issue date Nov 14, 1989
    • Hitachi, Ltd.
    • Haruo Koharagi
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Electric vacuum cleaner
    • Patent number D302878
    • Issue date Aug 15, 1989
    • Hitachi, Ltd.
    • Shigetaka Kimura
    • D32 - Washing, cleaning, or drying machine
  • Information Patent Grant

    Vacuum cleaner having a blower facility structure
    • Patent number 4,809,394
    • Issue date Mar 7, 1989
    • Hitachi, Ltd.
    • Hisao Suka
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Upright type electric cleaner
    • Patent number 4,446,594
    • Issue date May 8, 1984
    • Hitachi, Ltd.
    • Syuji Watanabe
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...

Patents Applicationslast 30 patents