Masaaki Sekizawa

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Katsuta, JP

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Patents Grantslast 30 patents

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
Vibratory tool with a vibration proof mechanism for the handle thereof
- Patent number 4,401,167
- Issue date Aug 30, 1983
- Hitachi Koki Company, Limited
- Masaaki Sekizawa
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS