Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5162661 | Position detector for maintaining a fixed distance between two objects | Shoji Taniguchi, Naoharu Yanagawa | 1992-11-10 |
| 5132950 | Optical head having a prism for splitting a beam of light into two polarized light beams | Naoharu Yanagawa | 1992-07-21 |
| 5124970 | Optical head having a prism | Naoharu Yanagawa | 1992-06-23 |
| 4773052 | Dual mode disk player/recorder | Satoshi Sugiura | 1988-09-20 |
| 4663750 | Focus error detection device for an optical recording/playing back system | Kenjiro Hamanaka, Shinsaku Nozu, Hozumi Tanaka | 1987-05-05 |
| 4658391 | Focus error detection device for an optical recording/playing back system | Shinsaku Nozu, Hozumi Tanaka, Kenjiro Hamanaka | 1987-04-14 |
| 4513408 | Error detecting system of video/audio disc player | Susumu Nomura | 1985-04-23 |
| 4429378 | Optical pickup device for use in a video and/or audio disc player | — | 1984-01-31 |
| 4406520 | Beam splitter optical system of signal pickup device | — | 1983-09-27 |