Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8213095 | Projection lens and projection display device using the same | Masaru Amano | 2012-07-03 |
| 7672062 | Projection zoom lens and projection type display device | Akiko Nagahara, Hiroshi Yamada | 2010-03-02 |
| 7558002 | Projection zoom lens and projection-type display device | Hiroshi Yamada | 2009-07-07 |
| 7227693 | Zoom lens and projection display device using the zoom lens | Fumio Watanabe | 2007-06-05 |
| 6840624 | Polarized beam splitter and projection-type image display using it | Kazuya Yoneyama | 2005-01-11 |
| 6493152 | Wide converter lens | Tomoyuki Baba | 2002-12-10 |
| 6457829 | Projection device comprising a correction lens arranged between a prism optical system and at least one of three optical modulation elements | Kenzo Sado | 2002-10-01 |
| 6449100 | Teleconverter lens | Tomoyuki Baba | 2002-09-10 |
| 6353509 | Wide-angle lens | — | 2002-03-05 |
| 6160671 | Retro-focus lens | — | 2000-12-12 |
| 6137635 | Projector apparatus | — | 2000-10-24 |
| 6038085 | Super wide angle lens | — | 2000-03-14 |
| 5949589 | Retro-focus type lens | — | 1999-09-07 |