Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4766504 | Video disk and recorder with time recorded twice | Toshio Narusawa | 1988-08-23 |
| 4683502 | Video disc type recording and reproducing system with interference reduction filter | Satoru Nomura | 1987-07-28 |