Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5625616 | Deterioration estimating method for a light emitting device and a light emission driving apparatus using the method | Shigeaki Koike, Shinji Kaneko, Yoshizo Mihara | 1997-04-29 |