Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4339183 | Film reader | Yu Yamada, Toshio Arai, Kokichi Omi, Hiroaki Suzuki, Tetsuro Kuwayama | 1982-07-13 |
| 4229085 | Film reader | Yu Yamada, Toshio Arai, Kokichi Omi, Hiroaki Suzuki, Tetsuro Kuwayama | 1980-10-21 |