Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7855840 | Projection zoom lens and projection type image display device | — | 2010-12-21 |
| 7667898 | Zoom lens and projector | — | 2010-02-23 |
| 7307799 | Imaging optical system | — | 2007-12-11 |
| 6906868 | Zoom lens system | — | 2005-06-14 |
| 6781768 | Zoom len system | — | 2004-08-24 |
| 6597513 | Zoom lens system | — | 2003-07-22 |
| 6396627 | Stereoscopic microscope including zoom and relay optical systems | Satoru Tachihara, Chinari Tanaka, Daisuke Koreeda, Tetsuya Nakamura, Takaomi Sekiya +1 more | 2002-05-28 |
| 6344931 | Zoom lens system | — | 2002-02-05 |
| 6181488 | Photographic lens | Shuji Yoneyama | 2001-01-30 |
| 6181487 | Photographic lens | Shuji Yoneyama | 2001-01-30 |
| 5645334 | Projector and focusing method therein | Yasuyuki Tejima, Masakuni Iwanaga | 1997-07-08 |
| 5600488 | Projection lens assembly and projector | Yasuyuki Tejima, Masakazu Yamagata | 1997-02-04 |
| 5504625 | Variable power projection lens | — | 1996-04-02 |
| 5442413 | Pupil conjugate-coupling device in projecting optical system | Yasuyuki Tejima, Yasunori Izawa, Ryota Ogawa | 1995-08-15 |
| 5305029 | Projector | Kazushi Yoshida, Yasuyuki Tejima, Satoru Tachihara | 1994-04-19 |
| 5291241 | Optical device | Hiroyuki Hirano, Yasunori Arai, Minoru Suzuki | 1994-03-01 |
| 5283599 | Apparatus for combining and projecting images | Yasuyuki Tejima, Takashi Iizuka, Yasunori Arai | 1994-02-01 |
| 5278698 | Magnifying projecting lens | Takashi Iizuka, Yasunori Arai, Kazushi Yoshida | 1994-01-11 |
| 5260833 | Zoom lens system | Takayuki Ito | 1993-11-09 |
| 5155629 | Zoom lens system | Takayuki Ito | 1992-10-13 |
| 5066987 | Shading board for copying apparatus | Yasunori Arai | 1991-11-19 |
| 5015079 | Copying lens system | — | 1991-05-14 |
| 4964696 | Color separating optical apparatus | Minoru Suzuki, Osamu Fujimoto | 1990-10-23 |
| 4913540 | Telecentric projection lens system | — | 1990-04-03 |
| 4832465 | Zoom lens for use in copying | Yasunori Arai | 1989-05-23 |