Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823335 | Optical head device having deflection means including means for reducing reflected light angle | Shinsuke Shikama, Eiichi Tiode | 1989-04-18 |
| 4817072 | Optical head utilizing diffraction grating | Eiichi Toide, Shinsuke Shikama | 1989-03-28 |
| 4811329 | Optical head with laser having particular source of driving current | Shinsuke Shikama, Eiichi Toide | 1989-03-07 |
| 4797545 | Optical head device having positionally adjustable parts | Shinsuke Shikama, Eiichi Toide | 1989-01-10 |