Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5699331 | Apparatus operating with recording medium according to positional information of a secret code | — | 1997-12-16 |
| 5682360 | Recording and reproducing apparatus for use with a recording medium having an optical recording layer and magnetic recording layer | — | 1997-10-28 |
| 5600672 | Communication system | Seiji Sakashita | 1997-02-04 |