Chen-Chih Yen

Follow

Person

Chiayi, TW

People

Patents Applicationslast 30 patents

Information Patent Application
Cold forged stainless tool and method for making the same
- Publication number 20090282952
- Publication date Nov 19, 2009
- Potzu Forging Co., Ltd.
- Chen-Chih Yen
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...