Yasuo Kohashi

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Mito, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for manufacturing internal gear, internal gear...
- Patent number 5,584,202
- Issue date Dec 17, 1996
- Hitachi, Ltd.
- Hisanobu Kanamaru
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...