Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691972 | Multimedia optical disc which conforms to the motion picture rating systems in a variety of countries and a reproducing device for said disc | Masayuki Kozuka, Yoshihisa Fukushima, Hideki Mimura, Takeshi Hagio | 1997-11-25 |