Haruma Tanaka

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Fujimi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of making pulleys with plural V-shaped grooves
- Patent number 4,955,133
- Issue date Sep 11, 1990
- Sanshu Press Industry Company, Ltd.
- Haruma Tanaka
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...