Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4659186 | Small size zoom lens | Yasuyuki Yamada, Hiroki Nakayama | 1987-04-21 |
| 4652091 | Compact zoom lens with short back focal distance | Kouji Oizumi, Yasuyuki Yamada, Hiroki Nakayama | 1987-03-24 |
| 4643536 | Rear conversion lens | Yasuyuki Yamada, Hiroki Nakayama, Kouji Oizumi | 1987-02-17 |
| 4596447 | Conversion type varifocal lens system | Yasuyuki Yamada, Hideo Yokota | 1986-06-24 |
| 4595270 | Finder system | Yasuyuki Yamada, Kazuo Fujibayashi, Hideo Yokota | 1986-06-17 |
| 4582409 | Albada finder with display within the field of view | Yasuyuki Yamada, Hiroki Nakayama, Hideo Yokota | 1986-04-15 |
| 4542961 | Triplet type objective | — | 1985-09-24 |
| 4486074 | Interchangeable lens permitting an automatic focus-adjusting device to be removably mounted thereto | — | 1984-12-04 |
| 4477154 | Photographic objective | — | 1984-10-16 |
| 4477155 | Photographic lens of the partial focusing type | Hideo Yokota, Yasuyuki Yamada | 1984-10-16 |
| 4456352 | Light receiving apparatus for use in single-lens reflex camera | — | 1984-06-26 |
| 4437741 | Light measuring device for a single lens reflex camera | — | 1984-03-20 |
| 4413888 | Compact photographic objective | — | 1983-11-08 |
| 4380377 | Compact zoom lens | Sadahiko Tsuji | 1983-04-19 |
| 4324458 | Tele-objective lens with a movable sub-group for focusing | — | 1982-04-13 |
| 4294529 | Camera | Sadahiko Tsuji, Kazuo Ishikawa | 1981-10-13 |
| 4240698 | Large aperture zoom lens | Sadahiko Tsuji | 1980-12-23 |
| 4240699 | Zoom lens having extended focusing range | Sadahiko Tsuji, Katsumi Tanaka | 1980-12-23 |
| 4230398 | Zoom lens system | Sadahiko Tsuji | 1980-10-28 |
| 4217050 | Photographic camera with an image of exposure condition indicia visible through a view-finder thereof | Akira Tajima, Yukiharu Ono | 1980-08-12 |
| 4200358 | Wide-angle type zoom lens | Sadahiko Tsuji | 1980-04-29 |
| 4200380 | Camera provided with means for giving information about photographing | Sadahiko Tsuji, Kazuo Ishikawa, Susumu Matsumura | 1980-04-29 |