Yoshihiko Watanabe

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Katsuta, JP

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Patents Grantslast 30 patents

Information Patent Grant
Portable electric hammer drill
- Patent number D380132
- Issue date Jun 24, 1997
- Hitachi Koki Company Limited
- Naoki Matsunaga
- D08 - Tools and hardware
Information Patent Grant
Percussion hammer
- Patent number 5,456,324
- Issue date Oct 10, 1995
- Hitachi Koki Company Limited
- Toshiaki Takagi
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Slipping torque changing apparatus for impact tool
- Patent number 5,346,023
- Issue date Sep 13, 1994
- Hitachi Koki Company Limited
- Toshiaki Takagi
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Portable elecrtric hammer drill
- Patent number D349029
- Issue date Jul 26, 1994
- Hitachi Koki Company Limited
- Naoki Matsunaga
- D08 - Tools and hardware
Information Patent Grant
Electric hammer drill having dust collecting device
- Patent number 5,129,467
- Issue date Jul 14, 1992
- Hitachi Koki Company Limited
- Yoshihiko Watanabe
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Percussion drill
- Patent number 4,336,847
- Issue date Jun 29, 1982
- Hitachi Koki Company, Limited
- Koshichi Ito
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS