Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6476975 | Mother glass composition for graded index lens | Tetsuro Yoshii, Tadashi Koyama | 2002-11-05 |
| 6429977 | Optical imaging system | — | 2002-08-06 |
| 6366408 | Optical imaging system | Hiroyuki Nemoto, Shinji Kawamoto | 2002-04-02 |
| 6330116 | Optics using a gradient index lens | — | 2001-12-11 |
| 6252722 | Endoscopic objective lens | Nobuo Shibayama | 2001-06-26 |
| 6078431 | Object lens system | Koji Kakimoto, Hiroshi Koshi | 2000-06-20 |
| 6066273 | Axial refractive index distributed lens | Jun Yamaguchi, Yoshinori Shiotani | 2000-05-23 |
| 6031668 | Optical imaging system | Minoru Toyama, Atsushi Akiba | 2000-02-29 |
| 6010787 | Glass compositions for core/cladding type distributed index optical element | Jun Yamaguchi, Kiyosumi Fujii | 2000-01-04 |
| 5978146 | Rod lens array and life-size imaging optical apparatus using the same | Kiyosumi Fujii | 1999-11-02 |
| 5959783 | Rod lens array and life-size imaging optical apparatus using the same | Kiyosumi Fujii | 1999-09-28 |
| 5949585 | Optics using graded-index lens | — | 1999-09-07 |
| 5139557 | Method of performing an ion exchange of optical glass | Hiroshi Koshi, Yoshikazu Kaite, Minoru Toyama, Noboru Akazawa | 1992-08-18 |
| 5050970 | Lens system for use in optical information device | — | 1991-09-24 |