Fujimasa Koyama

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Kitakyushu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for rolling metallic material
- Patent number 4,106,318
- Issue date Aug 15, 1978
- Nippon Steel Corporation
- Samon Yanagimoto
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...