Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8053995 | LED light string without additional resistors | Cheng-Fen Chang, Chen-Hsien Chang, Chen-Tao Chang | 2011-11-08 |
| 8044599 | Light string with alternate LED lamps and incandescent lamps | Cheng-Fen Chang, Chen-Hsien Chang, Chen-Tao Chang | 2011-10-25 |
| 7597454 | Christmas light string with socket for connecting to another christmas light string | Cheng-Fen Chang, Chen-Hsien Chang, Chen-Tao Chang | 2009-10-06 |
| D459009 | String lamp | Zheng-Xian Chang, Zheng Chang | 2002-06-18 |
| 4227096 | Microwave integrated circuit for Josephson voltage standards | Robert A. Administrator of the National Aeronautics and Space Frosch, Louis B. Holdeman, Jaan Toots | 1980-10-07 |