Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8922903 | Projection zoom lens and projection type display device | Masaru Amano | 2014-12-30 |
| 8896929 | Projection zoom lens and projection type display device | Tomoyuki Baba, Masaru Amano | 2014-11-25 |
| 8693105 | Variable magnification optical system for projection and projection-type display apparatus | Yukiko Nagatoshi | 2014-04-08 |
| 8390935 | Projection zoom lens and projection display device | — | 2013-03-05 |
| 8379316 | Zoom lens for projection and projection-type display apparatus | — | 2013-02-19 |
| 8270092 | Zoom lens for projection and projection-type display apparatus | Yukiko Nagatoshi, Hiroshi Yamada | 2012-09-18 |
| 7889431 | Projection zoom lens and projection-type display apparatus | — | 2011-02-15 |
| 7672062 | Projection zoom lens and projection type display device | Kimiaki Nakazawa, Hiroshi Yamada | 2010-03-02 |
| 7605985 | Projection zoom lens and projection type display device | Hiroshi Yamada | 2009-10-20 |
| 7522348 | Zoom lens and projection display device using the same | — | 2009-04-21 |
| 7280285 | Projection lens and projection display device using the same | Chikara Yamamoto | 2007-10-09 |
| 6989940 | Zoom lens and projection display device which uses same | — | 2006-01-24 |
| 6809877 | Zoom lens and projection display device using the same | — | 2004-10-26 |
| 6801367 | Zoom lens and projection display device which uses same | — | 2004-10-05 |
| 6768595 | Five-group zoom lens and projection display device including it | — | 2004-07-27 |
| 6639738 | Imaging lens | — | 2003-10-28 |
| 6580564 | Wide-angle zoom lens and projection-type display unit using it | — | 2003-06-17 |
| 6542311 | Zoom lens and projection type display apparatus using the same | — | 2003-04-01 |
| 6301058 | Wide-angle lens | — | 2001-10-09 |
| 6222680 | Zoom lens | Chikara Yamamoto, Hiroshi Yamada | 2001-04-24 |
| 6204976 | Zoom lens | — | 2001-03-20 |
| 6104553 | Image-forming lens | — | 2000-08-15 |
| 6075658 | Imaging lens | — | 2000-06-13 |
| 6043941 | Image-forming lens having four lens elements | Hiroshi Yamada | 2000-03-28 |
| 6011660 | Imaging lens | — | 2000-01-04 |