Koji SOTOKAWA

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Aikoh-gun, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of punching damper with use of hollow punch, punching appara...
- Patent number 9,339,941
- Issue date May 17, 2016
- NHK Spring Co., Ltd.
- Koji Sotokawa
- B26 - HAND CUTTING TOOLS CUTTING SEVERING

Patents Applicationslast 30 patents

Information Patent Application
METHOD OF PUNCHING DAMPER WITH USE OF HOLLOW PUNCH, PUNCHING APPARA...
- Publication number 20130047807
- Publication date Feb 28, 2013
- NHK Spring Co., Ltd.
- Koji SOTOKAWA
- B26 - HAND CUTTING TOOLS CUTTING SEVERING