Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5848037 | Data recording medium and data recording apparatus for recording identification signal on the data recording medium | Yasuo Iwasaki, Nobuhiro Chiba | 1998-12-08 |
| 5657309 | Video disc recording and playback system with two recording areas to record an information signal and a reference signal | Kan Ebisawa | 1997-08-12 |