Atsushi Shimura

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing a hollow cam shaft
- Patent number 4,612,695
- Issue date Sep 23, 1986
- Nippon Piston Ring Co., Ltd.
- Genkichi Umeha
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...