Kazuhiro Yamakawa

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Ebina, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of hardening a valve face of a poppet valve
- Patent number 6,295,731
- Issue date Oct 2, 2001
- Fuji Oozx Inc.
- Kazuhiro Yamakawa
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES