Mutsuo Harada

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Hitachinaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Percussion tool
- Patent number 6,155,356
- Issue date Dec 5, 2000
- Hitachi Koki Co., Ltd.
- Atsuyuki Kikuchi
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Holding device for percussion tool
- Patent number 5,971,403
- Issue date Oct 26, 1999
- Hitachi Koko Co., Ltd.
- Akihisa Yahagi
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Vibration-damping structure for electric hammer
- Patent number 5,522,466
- Issue date Jun 4, 1996
- Hitachi Koki Company Limited
- Mutsuo Harada
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS