Kenji Nakajima

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for making connecting pipes for connecting ducts
- Patent number 4,704,885
- Issue date Nov 10, 1987
- Ariyoshi Nakamura
- Kenji Nakajima
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...