Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5900992 | Collapsible lens barrel | Tsuneo Watanabe | 1999-05-04 |
| 5754907 | Diaphragm movement device | — | 1998-05-19 |
| 5719709 | Lens barrel having biasing force adjusting member | — | 1998-02-17 |
| 5489963 | Auto-focusing device | Hitoshi Imanari | 1996-02-06 |
| 5481406 | Mechanism for waterproofing operation member of interchangeable lens barrel | Satoshi Yamazaki, Toru Takayama, Kunihiro Fukino, Hitoshi Imanari | 1996-01-02 |
| 5420721 | Lens barrel | Hideo Kanno, Kunihiro Fukino, Hideshi Naito | 1995-05-30 |
| 5185622 | Electric connecting apparatus for camera system | Koushi Yoshibe | 1993-02-09 |
| 5122826 | Focusing control apparatus with aberration compensation | — | 1992-06-16 |
| 5066103 | Helicoid threaded tube of synthetic resin and lens barrel comprising it | Kiyonobu Takabayashi | 1991-11-19 |
| 4974001 | Diaphragm device | Tsuneo Watanabe | 1990-11-27 |
| 4925282 | Zoom lens assembly | Hideo Kanno, Hitoshi Imanari, Hideshi Naito, Naoto Ohta | 1990-05-15 |
| 4681406 | Zoom lens assembly | Hideshi Naito, Yoshiharu Shiokama | 1987-07-21 |