Takafumi Nakahara

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Fukushima, JP

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Patents Grantslast 30 patents

Information Patent Grant
Metal forged product, upper or lower arm, preform of the arm, produ...
- Patent number 7,770,427
- Issue date Aug 10, 2010
- Showa Denko K.K.
- Takafumi Nakahara
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Closed forging method, forging production system using the method,...
- Patent number 7,257,981
- Issue date Aug 21, 2007
- Showa Denko K.K.
- Masayuki Natsui
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
Metal forged product, upper or lower arm, preform of the arm, produ...
- Publication number 20060185416
- Publication date Aug 24, 2006
- Takafumi Nakahara
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...