Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4469412 | Wide angle zoom lens | Keiji Ikemori | 1984-09-04 |
| 4400064 | Zoom lens | Keiji Ikemori | 1983-08-23 |
| 4391493 | Method to increase focal distance at telephotographic side of a zoom lens system | Sadahiko Tsuji | 1983-07-05 |
| 4329022 | Two group type zoom lens with wide image angle | Shin Yamaguchi, Keiji Ikemori | 1982-05-11 |
| 4217050 | Photographic camera with an image of exposure condition indicia visible through a view-finder thereof | Yasuhisa Sato, Yukiharu Ono | 1980-08-12 |