Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5694387 | Optical medium having a data pattern for detecting an upside-down insertion, and reproducing apparatus for use therewith | Yasuhiro Gotoh, Michiyoshi Nagashima | 1997-12-02 |
| 5691972 | Multimedia optical disc which conforms to the motion picture rating systems in a variety of countries and a reproducing device for said disc | Kazuhiro Tsuga, Masayuki Kozuka, Hideki Mimura, Takeshi Hagio | 1997-11-25 |
| 5642338 | Information recording medium and apparatus and method for recording and reproducing information | Masahiro Inagaki, Yasushi Azumatani, Hiroshi Hamasaka | 1997-06-24 |
| 5596564 | Information recording medium and apparatus and method for recording and reproducing information | Masahiro Inagaki, Yasushi Azumatani, Hiroshi Hamasaka | 1997-01-21 |