Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5270990 | Tracking error signal detecting apparatus using an electron beam and apparatus for effecting recording/reproduction of information by the utilization of a plurality of electron beams | Takahiko Ishiwatari, Ryuichi Arai, Mamoru Miyawaki, Yukio Masuda, Hitoshi Oda | 1993-12-14 |