Tomoyoshi Hirazuka

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Katsuta, JA

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Patents Grantslast 30 patents

Information Patent Grant
Method for manufacturing a unit piece of a V pulley
- Patent number 3,933,023
- Issue date Jan 20, 1976
- Hitachi, Ltd.
- Hideo Tatsumi
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...