Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7830604 | Projection lens, image projection apparatus and optical apparatus | — | 2010-11-09 |
| 7826147 | Zoom lens and image projection apparatus | Junya Ichimura, Saburo Sugawara | 2010-11-02 |
| 7817345 | Zoom lens and image projection apparatus including the same | — | 2010-10-19 |
| 7690793 | Illumination optical system and projection-type image display apparatus | Hiroyuki Kodama | 2010-04-06 |
| 7686459 | Lens array optical system, projection optical unit, and image projection apparatus | Hiroyuki Kodama | 2010-03-30 |
| 7614751 | Illumination optical system and image display apparatus including the same | — | 2009-11-10 |
| 7576921 | Zoom lens and image projection apparatus | — | 2009-08-18 |
| 7575328 | Illumination optical system and image display apparatus making use thereof | — | 2009-08-18 |
| 7576923 | Zoom lens and image projection apparatus having the same | — | 2009-08-18 |
| 7429110 | Projector-type image display apparatus | — | 2008-09-30 |
| 7403339 | Zoom lens and image projection apparatus having the same | — | 2008-07-22 |
| 7364303 | Image display apparatus | — | 2008-04-29 |
| 7190528 | Zoom lens and image projection apparatus having the same | — | 2007-03-13 |
| 6621533 | Polarization separation element, a polarization conversion system, an optical element, and a projection display system | Jason Slack, Marina Khazova, Tamotsu Takatsuka, Keisuke Mitani, Graham J. Woodgate +3 more | 2003-09-16 |
| 6417941 | Hologram-type polarized-light splitting element | — | 2002-07-09 |
| 6290358 | Polarized-light converting optical system, a polarized-light converting elemental device, a polarized-light converting elemental device array and a projection-type display device using any one of those components | Yoshiharu Sakai | 2001-09-18 |
| 6038054 | Polarized-light converting elemental device having cholesteric crystal layer | Yoshiharu Sakai | 2000-03-14 |