Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881232 | Method and apparatus for error correction | Yoichiro Sako | 1989-11-14 |
| 4852101 | Apparatus for recording and/or reproducing optical cards | Shoei Kobayashi, Takuya Wada | 1989-07-25 |
| 4829497 | Optical disc recording method and apparatus for digital data having a plurality of transmission rates | Yoichiro Sako, Tamotsu Yamagami | 1989-05-09 |
| 4819236 | Data transmission method suitable for a disc | Yoichiro Sako, Tamotsu Yamagami | 1989-04-04 |