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Masao Sunagawa

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  • Hitachi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum cleaner and suction nozzle body thereof cross reference to r...
    • Patent number 6,282,749
    • Issue date Sep 4, 2001
    • Hitachi, Ltd.
    • Taiji Tajima
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Vacuum cleaner and suction nozzle body therefor
    • Patent number 6,212,732
    • Issue date Apr 10, 2001
    • Hitachi, Ltd.
    • Taiji Tajima
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Vacuum cleaner
    • Patent number 5,365,633
    • Issue date Nov 22, 1994
    • Hitachi, Ltd.
    • Masao Sunagawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • 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

    Vacuum cleaner having silencer mechanism
    • Patent number 5,159,738
    • Issue date Nov 3, 1992
    • Hitachi, Ltd.
    • Masao Sunagawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Vacuum cleaner
    • Patent number 5,131,114
    • Issue date Jul 21, 1992
    • 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 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

    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

    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

    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...