Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6487719 | Method and apparatus for monitoring TV channel selecting status | Hiroshi Tanaka | 2002-11-26 |
| 5162905 | Automatic commercial message recognition and monitoring device | Hidetoshi Ichige, Tadayuki Aoyama | 1992-11-10 |