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Shumi Akazawa

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Patents Grantslast 30 patents

  • Information Patent Grant

    Power carving tool
    • Patent number 5,669,453
    • Issue date Sep 23, 1997
    • Ryobi Limited
    • Shumi Akazawa
    • B44 - DECORATIVE ARTS
  • Information Patent Grant

    Router attachment
    • Patent number 5,662,440
    • Issue date Sep 2, 1997
    • Ryobi North America
    • Naoki Kikuchi
    • B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
  • Information Patent Grant

    Electrode terminal holder for battery drive tool
    • Patent number 5,441,828
    • Issue date Aug 15, 1995
    • Ryobi Limited
    • Shumi Akazawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Battery type screw driver
    • Patent number 5,360,073
    • Issue date Nov 1, 1994
    • Ryobi Limited
    • Shumi Akazawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Electric power tool
    • Patent number 5,230,261
    • Issue date Jul 27, 1993
    • Ryobi Limited
    • Shumi Akazawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Portable electric drill
    • Patent number D314498
    • Issue date Feb 12, 1991
    • Ryobi Ltd.
    • Kiyoshi Hoshino
    • D08 - Tools and hardware
  • Information Patent Grant

    Electric drill
    • Patent number D299808
    • Issue date Feb 14, 1989
    • Ryobi Limited
    • Kiyoshi Hoshino
    • D08 - Tools and hardware
  • Information Patent Grant

    Electric drill
    • Patent number D296413
    • Issue date Jun 28, 1988
    • Ryobi Limited
    • Kiyoshi Hoshino
    • D08 - Tools and hardware
  • Information Patent Grant

    Electric drill's chuck key holding device
    • Patent number 4,747,733
    • Issue date May 31, 1988
    • Ryobi Ltd.
    • Shumi Akazawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Electric drill
    • Patent number D295364
    • Issue date Apr 26, 1988
    • Ryobi Limited
    • Kiyoshi Hoshino
    • D08 - Tools and hardware
  • Information Patent Grant

    Electric drill
    • Patent number D295141
    • Issue date Apr 12, 1988
    • Ryobi Limited
    • Kiyoshi Hoshino
    • D08 - Tools and hardware
  • Information Patent Grant

    Socket for an electric charger of a battery
    • Patent number 4,726,794
    • Issue date Feb 23, 1988
    • Ryobi Ltd.
    • Masaharu Narisue
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Driver drill
    • Patent number D279957
    • Issue date Aug 6, 1985
    • Ryobi Limited
    • Shumi Akazawa
    • D08 - Tools and hardware