Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8053995 | LED light string without additional resistors | Chu-Cheng Chang, Chen-Hsien Chang, Chen-Tao Chang | 2011-11-08 |
| 8044599 | Light string with alternate LED lamps and incandescent lamps | Chu-Cheng Chang, Chen-Hsien Chang, Chen-Tao Chang | 2011-10-25 |
| 7597454 | Christmas light string with socket for connecting to another christmas light string | Chu-Cheng Chang, Chen-Hsien Chang, Chen-Tao Chang | 2009-10-06 |