Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6407511 | Electronic ballast suitable for lighting control in fluorescent lamp | Changgen Yang | 2002-06-18 |
| 6343871 | Body height adjustable electric bulb for illuminated signs | — | 2002-02-05 |