Issued Patents All Time
Showing 1–25 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12174343 | Imaging optical system | Chang Shih-Yuan, Tetsuya ZENKO, Kenta Ishii, Daisuke Seki | 2024-12-24 |
| 6506446 | Anti-fog coating material and method of preparing an anti-fog article | Tohru Yamamoto, Shigeo Yoshida, Hatsumi Ikari, Keiji Ohtaka, Hideo Ukuda | 2003-01-14 |
| 6327430 | Camera having antifogging film | Keiji Ohtaka, Hirokazu Ichiki | 2001-12-04 |
| 6306932 | Anti-fogging coating material, anti-fogging coating film and anti-fogging article | Tohru Yamamoto, Shigeo Yoshida, Hatsumi Ikari, Keiji Ohtaka, Hideo Ukuda | 2001-10-23 |
| 6055376 | Observation optical system and optical apparatus having the same | Keiji Ohtaka | 2000-04-25 |
| 5976680 | Non-fogging antireflection film and optical member, and production process thereof | Shoichi Shimura, Tohru Yamamoto, Shigeo Yoshida, Hatsumi Ikari | 1999-11-02 |
| 5576779 | Camera system | Yoshinori Itoh | 1996-11-19 |
| 5392082 | Photographing apparatus having a trimming photographic mode | Takeshi Koyama | 1995-02-21 |
| 5319405 | Camera system | — | 1994-06-07 |
| 5305148 | Compact varifocal lens | Kouji Oizumi, Yoshinori Itoh | 1994-04-19 |
| 5289317 | Compact zoom lens | Koutaro Yano, Hiroki Nakayama | 1994-02-22 |
| 5270866 | Compact zoom lens | Kouji Oizumi, Yasuhisa Sato, Yasuyuki Yamada, Hiroki Nakayama, Takashi Matsushita | 1993-12-14 |
| 5173805 | Focusing method for zoom lens | Kazuo Tanaka, Masatake Kato | 1992-12-22 |
| 5078481 | Magnification changing lens | Hiroki Nakayama | 1992-01-07 |
| 4865434 | Zoom lens capable of selecting a focal length beyond a standard focal length range | Takashi Matsushita, Sadatoshi Takahashi, Nozomu Kitagishi, Tsunefumi Tanaka | 1989-09-12 |
| 4836661 | Optical system of variable magnification power | — | 1989-06-06 |
| 4830477 | Zoom lens capable of obtaining focal lengths beyond a variable focal length range | Sadatoshi Takahashi, Nozomu Kitagishi, Tsunefumi Tanaka, Takashi Matsushita, Kikuo Momiyama | 1989-05-16 |
| 4826301 | Photographic system having soft focus function | — | 1989-05-02 |
| 4804986 | Camera | Ichiro Ohnuki, Masaharu Eguchi | 1989-02-14 |
| 4789227 | Zoom lens | Tsunefumi Tanaka, Masatake Kato, Kazuo Tanaka | 1988-12-06 |
| 4784479 | Varifocal optical system | — | 1988-11-15 |
| 4781446 | Zoom lens having a capability of introducing special features into image formats | Tsunefumi Tanaka, Takashi Matsushita, Nozomu Kitagishi, Sadatoshi Takahashi | 1988-11-01 |
| 4775228 | Zoom lens | Takashi Matsushita | 1988-10-04 |
| 4750821 | Zoom lens assembly | Hiroshi Yamamoto | 1988-06-14 |
| 4730199 | Photographic apparatus | Ichiro Ohnuki, Masaharu Eguchi | 1988-03-08 |