Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6559900 | Lens system for a projection display apparatus in which lenses are uniform in one direction and nonuniform in another | Makoto Shinoda, Tohru Kawai, Kenji Sugihara | 2003-05-06 |
| 6365526 | Optical illumination system and projection apparatus | Kenji Sugihara, Koji Kita, Makoto Shinoda | 2002-04-02 |
| 6186629 | Optical device and display apparatus | Atsushi Iwamura, Toru Kawai | 2001-02-13 |
| 5764421 | Zoom lens system having minimal aberration fluctuation at short object distance | Seiji Shimizu | 1998-06-09 |
| 5675440 | Photographic lens | — | 1997-10-07 |
| 5581400 | Finder optical system with low-hygroscopic organic material | Hiroshi Takase, Masaki Imaizumi, Masaru Morooka | 1996-12-03 |
| 5570229 | Real image mode variable magnification finder optical system | — | 1996-10-29 |
| 5325235 | Compact zoom lens system | Masaru Takashima | 1994-06-28 |
| 5206675 | Real image mode finder optical system | Yuji Miyauchi | 1993-04-27 |
| 5184252 | Finder optical system | Yuji Miyauchi, Shinichi Yoshii | 1993-02-02 |