Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5731905 | Eyepiece lens system | — | 1998-03-24 |
| 5727239 | Photographing optical apparatus | Masashi Hankawa, Yuji Ogasawara | 1998-03-10 |
| 5598296 | Prismatic telescope optical system | — | 1997-01-28 |
| 5581400 | Finder optical system with low-hygroscopic organic material | Hiroshi Takase, Tatsuru Kanamori, Masaru Morooka | 1996-12-03 |
| 5557464 | Wide-field eyepiece lens system | — | 1996-09-17 |
| 5321457 | Real image type finder system that changes an aspect ratio of a visual field by varying magnification | — | 1994-06-14 |
| 5148321 | Compact zoom lens system | Hisashi Goto, Shigeru Kato | 1992-09-15 |
| 4715693 | Vari-focal photographic lens system of rear lens group exchange type | Hiroshi Takase, Toru Fujii | 1987-12-29 |
| 4708442 | Varifocal lens system | Toru Fujii, Hiroshi Takase | 1987-11-24 |
| 4693566 | Zoom lens system | — | 1987-09-15 |
| 4668054 | Vari-focal photographic lens system of lens group exchange type | Hiroshi Takase, Toru Fujii | 1987-05-26 |
| 4653870 | Compact vari-focal photographic lens system | Hiroshi Takase, Toru Fujii | 1987-03-31 |
| 4609263 | Telephoto lens system having an improved focusing arrangement | — | 1986-09-02 |
| 4562344 | Automatic focus detecting mechanism for endoscopes | Shin-ichi Mihara, Toshihiro Imai, Ken-ichi Nakahashi, Youichi Iba, Akio Taira | 1985-12-31 |
| 4558928 | Focusing method for a telephoto lens system | — | 1985-12-17 |