Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7808723 | Photographic lens system and electronic imaging device using the same | — | 2010-10-05 |
| 7317581 | Fisheye lens system and a fisheye zoom lens system | Takayuki Ito | 2008-01-08 |
| 7116499 | Wide-angle lens system | — | 2006-10-03 |
| 6318912 | Adapter having a tilt and shift mechanism | Tetsuji Shono | 2001-11-20 |
| 6002887 | View finder | Toru Chiba | 1999-12-14 |
| 5822132 | Soft focus lens | — | 1998-10-13 |
| 5724193 | Super wide angle zoom lens | — | 1998-03-03 |
| 5717532 | Reflection-type compound optical elements | Toru Chiba, Masaki Shimizu | 1998-02-10 |
| 5572276 | Inner focus type telephoto zoom lens | — | 1996-11-05 |
| 5546232 | Two-group zoom lens | — | 1996-08-13 |
| 5448412 | Telephoto zoom lens system | Koichi Maruyama | 1995-09-05 |
| 5264965 | Zoom lens | — | 1993-11-23 |
| 5233474 | Wide-angle lens system | — | 1993-08-03 |
| 5172274 | Large aperture, medium telephoto lens system | — | 1992-12-15 |
| 5061053 | Telephoto zoom lens system | — | 1991-10-29 |
| 4934797 | Wide-angle lens system of a retrofocus type | — | 1990-06-19 |
| 4904070 | Telephoto lens system | — | 1990-02-27 |
| 4836663 | Telephoto zoom lens system | — | 1989-06-06 |
| 4781449 | Wide angle reading lens system | Yasunori Arai | 1988-11-01 |
| 4747676 | Wide-angle seven-element lens system | — | 1988-05-31 |