Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5978150 | Zoom lens | Kenzabro Suzuki | 1999-11-02 |
| 5272564 | Zoom lens of internal focusing system | Kenzaburo Suzuki | 1993-12-21 |
| 5257137 | Photo-taking lens for an underwater camera | Fumio Suzuki | 1993-10-26 |
| 5253112 | Rear conversion lens | Kenzaburo Suzuki | 1993-10-12 |
| 5231444 | Camera system including rear conversion lens | Tsuneo Watanabe, Yoshiharu Shiokama | 1993-07-27 |
| 5172154 | System camera | Yuichi Katagishi, Yoshiharu Shiokama | 1992-12-15 |
| 5136430 | Inner focusing type telephoto zoom lens | — | 1992-08-04 |
| 5126883 | Telephoto zoom lens | Haruo Sato | 1992-06-30 |
| 5007720 | Lens system enabling close distance photographing | — | 1991-04-16 |
| 4841325 | Automatic focusing device for camera | Kunihisa Hoshino, Ken Utagawa | 1989-06-20 |
| 4812868 | Detecting apparatus for focus in camera | Ken Utagawa | 1989-03-14 |
| 4804991 | Auto focusing light device | Kenji Ishizuki, Nobuyoshi Hagiuda, Norikazu Yokonuma | 1989-02-14 |
| 4796045 | Photo-taking lens assembly having an automatically and manually movable lens | Yoshiharu Shiokama, Hitoshi Imanari, Sachio Ohmori | 1989-01-03 |
| 4655558 | Rear focus conversion lens apparatus | — | 1987-04-07 |
| 4653871 | Rear conversion lens | — | 1987-03-31 |
| 4653877 | Rear-focus conversion device lens for telephoto lens | — | 1987-03-31 |
| 4641928 | Four-group telephoto zoom lens | — | 1987-02-10 |
| 4621909 | Photographic lens of a great aperture ratio | — | 1986-11-11 |
| 4591234 | Rear focus conversion lens | — | 1986-05-27 |
| 4514051 | Rear conversion lens | — | 1985-04-30 |
| 4468097 | Four-group great aperture ratio zoom lens | — | 1984-08-28 |
| 4468096 | Four-group telephoto zoom lens | — | 1984-08-28 |
| 4452513 | Zoom lens capable of close range photography and method of focusing the same to a short distance | — | 1984-06-05 |
| 4395094 | Large aperture ratio photographic lens with means for correcting aberrations | — | 1983-07-26 |
| 4392724 | Lens system capable of short distance photography | — | 1983-07-12 |