Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5640379 | Photomagnetic recording device and photomagnetic reproducing device | Kaichi Tatsuzawa, Shosuke Tanaka | 1997-06-17 |
| 5625616 | Deterioration estimating method for a light emitting device and a light emission driving apparatus using the method | Masaru Tezuka, Shinji Kaneko, Yoshizo Mihara | 1997-04-29 |