Issued Patents All Time
Showing 51–69 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5483512 | Optical information recording/reproducing device | — | 1996-01-09 |
| 5465245 | Optical pickup control system for an optical disc having recorded and non-recorded areas | — | 1995-11-07 |
| 5442609 | Tracking error signal correcting system which adjusts gain such that rending tracking error signals and recording trucking error signals and recording tracking error signals are equal | — | 1995-08-15 |
| 5381394 | Optical pickup for an optical disc player | — | 1995-01-10 |
| 5371725 | Position control system for a read-write head of a magneto-optical disc player having heads which move independently from each other | Shoji Taniguchi | 1994-12-06 |
| 5363358 | Optical disc apparatus with selection of three-beam and push-pull systems | — | 1994-11-08 |
| 5321686 | Read-write head of an magneto-optical disc player with both heads magnetically coupled together | Shoji Taniguchi | 1994-06-14 |
| 5287367 | Apparatus for controlling semiconductor laser | — | 1994-02-15 |
| 5253240 | Tracking error detecting system for removing an offset in an optical disk player | — | 1993-10-12 |
| 5193083 | Optical pick-up device | — | 1993-03-09 |
| 5172355 | Photo-detecting device including offset correction | Shinichi Nagahara, Takaaki Matsumoto | 1992-12-15 |
| 5168486 | Recording device for recording a blank disk from an optical disk | — | 1992-12-01 |
| 5162661 | Position detector for maintaining a fixed distance between two objects | Katsuharu Sato, Shoji Taniguchi | 1992-11-10 |
| 5150342 | Photo-detecting device | Shinichi Nagahara, Takaaki Matsumoto | 1992-09-22 |
| 5136567 | Photo-detecting device | Shinichi Nagahara, Takaaki Matsumoto | 1992-08-04 |
| 5132950 | Optical head having a prism for splitting a beam of light into two polarized light beams | Katsuharu Sato | 1992-07-21 |
| 5124970 | Optical head having a prism | Katsuharu Sato | 1992-06-23 |
| 5093816 | Optical magnetic recording and reproducing system | Shoji Taniguchi | 1992-03-03 |
| 5084850 | Apparatus for detecting focus error signal | Katsuharu Satoh | 1992-01-28 |