Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4979162 | Apparatus for detecting the secondary distortion of optical type recorded information | Shinichi Tanaka | 1990-12-18 |
| 4858218 | Optical recording medium and reproducing apparatus | Akihiro Takagi | 1989-08-15 |
| 4691308 | Apparatus for reproducing information from magnetooptical recording medium | Akihiro Takagi | 1987-09-01 |
| 4641296 | Optical head for information recording apparatus | Katsumi Mizunoe, Junichi Yanai | 1987-02-03 |