Issued Patents All Time
Showing 25 most recent of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6704052 | Image pickup optical system comprising a prism fixing member for preventing a deterioration in the capability of correcting decentration abberation, and apparatus therefore | Takayoshi Togino, Akira Tamagawa | 2004-03-09 |
| 6327094 | High-performance and compact image-forming optical system using prism elements | — | 2001-12-04 |
| 6178052 | Finder optical system | Takayoshi Togino | 2001-01-23 |
| 6094315 | Image-forming optical system | — | 2000-07-25 |
| 6084715 | Image-forming optical system and apparatus using the same | Takayoshi Togino, Akira Tamagawa | 2000-07-04 |
| 6078411 | Real-image finder optical system and apparatus using the same | — | 2000-06-20 |
| 6041193 | Real-image zoom finder with rotationally asymmetric surface | — | 2000-03-21 |
| 5889621 | Optical low pass filter | — | 1999-03-30 |
| 5786945 | Zoom lens system | Atsujiro Ishii | 1998-07-28 |
| 5703723 | Optical system comprising graded refractive index lens element | — | 1997-12-30 |
| 5610766 | Zooming lens system | Takanori Yamanashi | 1997-03-11 |
| 5559638 | Wide-angle lens system #6 | Takanori Yamanashi, Masashi Hankawa | 1996-09-24 |
| 5546229 | Optical system comprising graded refractive index lens element | — | 1996-08-13 |
| 5523885 | Viewfinder optical system | — | 1996-06-04 |
| 5361167 | Vari-focal lens system | — | 1994-11-01 |
| 5313328 | Optical system comprising graded refractive index lens element | — | 1994-05-17 |
| 5272566 | Varifocal lens system | — | 1993-12-21 |
| 5196962 | Vari-focal lens system | — | 1993-03-23 |
| 5184251 | Vari-focal lens system | Hirofumi Tsuchida | 1993-02-02 |
| 5172272 | Imaging lens system | — | 1992-12-15 |
| 5157550 | Vari-focal lens system | Hirofumi Tsuchida, Hiroshi Matsuzaki | 1992-10-20 |
| 5117309 | Vari-focal lens system having graded refractive index lens | — | 1992-05-26 |
| 5117308 | Lens system using unhomogenous media | Hirofumi Tsuchida, Kimiaki Yamamoto | 1992-05-26 |
| 5032012 | Rear converter lens system | Yuko Kobayashi | 1991-07-16 |
| 5029994 | Large-aperture quasi-telephoto lens system | — | 1991-07-09 |