Hajime Koshimaru

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Patents Grantslast 30 patents

Information Patent Grant
Closed chamber extrusion method and apparatus for shaping of metal...
- Patent number 4,342,213
- Issue date Aug 3, 1982
- Nissan Motor Co., Ltd.
- Hajime Koshimaru
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Process of closed extrusion shaping of a metal rod material and an...
- Patent number 4,287,747
- Issue date Sep 8, 1981
- Nissan Motor Co., Ltd.
- Hajime Koshimaru
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...