Issued Patents All Time
Showing 26–50 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4711534 | Zoom lens able to obtain focal lengths beyond the zooming range | Takashi Matsushita, Sadatoshi Takahashi, Nozomu Kitagishi, Tsunefumi Tanaka, Kikuo Momiyama | 1987-12-08 |
| 4707103 | Optical system of variable magnification | Takeshi Koyama | 1987-11-17 |
| 4705363 | Aberrational deterioration prevented zoom lens | — | 1987-11-10 |
| 4702567 | Zoom lens | Masatake Kato, Tsunefumi Tanaka, Kazuo Tanaka | 1987-10-27 |
| 4695133 | High range zoom lens | Nozomu Kitagishi, Sadatoshi Takahashi, Kikuo Momiyama, Tsunefumi Tanaka | 1987-09-22 |
| 4687302 | Zoom lens | Tsunefumi Tanaka, Masatake Kato | 1987-08-18 |
| 4684223 | Zoom lens of the rear focusing type | Masatake Kato | 1987-08-04 |
| 4666257 | Compact zoom lens | Tsunefumi Tanaka, Nozomu Kitagishi, Sadatoshi Takahashi, Kikuo Momiyama | 1987-05-19 |
| 4647160 | Small-sized wide angle zoom objective | — | 1987-03-03 |
| 4639096 | High range zoom lens | Nozomu Kitagishi, Kikuo Momiyama, Sadatoshi Takahashi, Tsunefumi Tanaka | 1987-01-27 |
| 4630899 | Zoom lens having movable diaphragm | Masatake Kato | 1986-12-23 |
| 4629294 | Zoom lens | Tsunefumi Tanaka, Sadatoshi Takahashi, Nozomu Kitagishi, Kikuo Momiyama | 1986-12-16 |
| 4586793 | Zoom lens | Tsunefumi Tanaka | 1986-05-06 |
| 4509833 | High variable magnification wide angle zoom lens | — | 1985-04-09 |
| 4477153 | Ultrawide angle zoom objective | Shigeyuki Suda | 1984-10-16 |
| 4469412 | Wide angle zoom lens | Akira Tajima | 1984-09-04 |
| 4468099 | Telephoto objective | — | 1984-08-28 |
| 4466707 | Variable magnification lens system | Kazuo Tanaka | 1984-08-21 |
| 4456340 | Optical system for focal length conversion | — | 1984-06-26 |
| 4437746 | Photo metering device for single lens reflex camera | — | 1984-03-20 |
| 4432615 | Zoom lens | — | 1984-02-21 |
| 4427268 | Variable magnification ratio lens | — | 1984-01-24 |
| 4422734 | Photographic lens system having an auxiliary lens | Kazuo Tanaka | 1983-12-27 |
| 4400064 | Zoom lens | Akira Tajima | 1983-08-23 |
| 4390248 | Wide angle zoom lens | — | 1983-06-28 |