Motoaki Sugiyama

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Kitakyushu, JA

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing seamless steel tube
- Patent number 4,006,618
- Issue date Feb 8, 1977
- Yanagimoto; Samon
- Samon Yanagimoto
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...