Hiroyasu Ishikawa

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Hitachinaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Pneumatically operated screw driver
- Patent number 6,026,713
- Issue date Feb 22, 2000
- Hitachi Koki Co., Ltd.
- Yasuki Ohmori
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Portable grinder
- Patent number 5,558,571
- Issue date Sep 24, 1996
- Hitachi Koki Company Limited
- Takeshi Toyoshima
- B24 - GRINDING POLISHING
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Dual-motor-driven drilling machine and method of controlling curren...
- Patent number 5,558,476
- Issue date Sep 24, 1996
- Hitachi Koki Co., Ltd.
- Toshiaki Uchida
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Portable power tool equipped with dust collector
- Patent number 4,675,999
- Issue date Jun 30, 1987
- Hitachi Koki Company, Ltd.
- Masanori Ito
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Power tool having a printed circuit board
- Patent number 4,370,579
- Issue date Jan 25, 1983
- Hitachi Koki Company, Limited
- Jyuro Kobayashi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER