Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853917 | Optical tracking apparatus with photodetector disposed outside part of the effective diameter of the lens system | Kazuo Uzuki, Makoto Shiho, Shigeru Aoi | 1989-08-01 |
| 4813032 | Magneto-optical information reproducing apparatus in which the azimuth angle of the transmission axis of an analyzer is optimized so that the C/N ratio of a reproducing signal is maximum | — | 1989-03-14 |
| 4803579 | Magneto-optical information reproducing apparatus in which divided reproducing lights are differentially detected by a photodetector having no amplifying action through an analyzer whose transmission axis azimuth is optimized | — | 1989-02-07 |