Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888760 | Optical head apparatus | Eiichi Toide, Mitsushige Kondou, Kazuo Iwata | 1989-12-19 |
| 4835761 | Signal to noise ratio of optical head apparatus employing semiconductor laser beam source | Eiichi Toide | 1989-05-30 |
| 4823335 | Optical head device having deflection means including means for reducing reflected light angle | Mitsushige Kondo, Eiichi Tiode | 1989-04-18 |
| 4817072 | Optical head utilizing diffraction grating | Eiichi Toide, Mitsushige Kondo | 1989-03-28 |
| 4811329 | Optical head with laser having particular source of driving current | Eiichi Toide, Mitsushige Kondo | 1989-03-07 |
| 4797545 | Optical head device having positionally adjustable parts | Mitsushige Kondo, Eiichi Toide | 1989-01-10 |