Chang-Wen Tsao

Follow

Person

Luchu, TW

People

Patents Grantslast 30 patents

Information Patent Grant
Zipper tooth structure and the zipper composed thereof
- Patent number 8,448,304
- Issue date May 28, 2013
- Chang-Wen Tsao
- A44 - HABERDASHERY JEWELLERY

Patents Applicationslast 30 patents

Information Patent Application
Structure of zipper's teeth with either english letter or symbol ap...
- Publication number 20130014356
- Publication date Jan 17, 2013
- Chang-Wen Tsao
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
Zipper tooth structure and the zipper composed thereof
- Publication number 20100306970
- Publication date Dec 9, 2010
- Chang-Wen Tsao
- A44 - HABERDASHERY JEWELLERY