Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4518250 | Exposure control device for a photographic enlarger | Yoshio Yuasa | 1985-05-21 |
| 4482978 | Key switch input control circuit | Yoshio Yuasa, Kazuhiko Naruse | 1984-11-13 |
| 4469437 | Light measurement and light control data calculation device for a photographic enlarger | Yoshio Yuasa, Hidetoshi Yasumoto, Kazuhiko Naruse, Masahito Inaba | 1984-09-04 |
| 4465370 | Light measuring device | Yoshio Yuasa | 1984-08-14 |