Yuuji Koyama

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Kobe, JP

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Patents Grantslast 30 patents

Information Patent Grant
Thin rolled steel plate having unequal thickness
- Patent number 4,245,490
- Issue date Jan 20, 1981
- Kobe Steel, Limited
- Ichiro Kokubo
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Production method of titanium hot coil by continuous hot rolling sy...
- Patent number 4,168,185
- Issue date Sep 18, 1979
- Kobe Steel, Ltd.
- Kensaburo Takisawa
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...