Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812866 | Photographic film package | Seimei Ushiro, Hiroshi Ohmura, Michio Cho, Tsutomu Tanaka, Yasuhiko Tanaka +1 more | 1989-03-14 |
| 4484799 | Wide angle zoom lens | Yoshikazu Doi, Yutaka Sakai | 1984-11-27 |
| 4294521 | Rear stop type zoom lens | Yoshikazu Doi, Yutaka Sakai | 1981-10-13 |