Hsien-Tsung Chang

Follow

Person

Chiayi, TW

People

Patents Grantslast 30 patents

Information Patent Grant
Eyeglass device
- Patent number 7,226,161
- Issue date Jun 5, 2007
- Contour Optik Inc.
- David Yinkai Chao
- G02 - OPTICS
Information Patent Grant
Magnetically attachable light assembly for glasses
- Patent number 6,974,226
- Issue date Dec 13, 2005
- Contour Optik, Inc.
- Hsien-Tsung Chang
- F21 - LIGHTING

Patents Applicationslast 30 patents

Information Patent Application
Magnetically attachable light assembly for glasses
- Publication number 20040150986
- Publication date Aug 5, 2004
- Hsien-Tsung Chang
- G02 - OPTICS