Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835761 | Signal to noise ratio of optical head apparatus employing semiconductor laser beam source | Shinsuke Shikama | 1989-05-30 |
| 4817072 | Optical head utilizing diffraction grating | Shinsuke Shikama, Mitsushige Kondo | 1989-03-28 |
| 4811329 | Optical head with laser having particular source of driving current | Shinsuke Shikama, Mitsushige Kondo | 1989-03-07 |
| 4797545 | Optical head device having positionally adjustable parts | Shinsuke Shikama, Mitsushige Kondo | 1989-01-10 |
| 4789978 | System and method of astigmatism correction in an optical head apparatus | Shinsuke Shikama | 1988-12-06 |