Issued Patents All Time
Showing 1–25 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9022581 | Projection display system with two reflecting mirrors | Koji Hirata, Masahiko Yatsu, Masayuki Ohki | 2015-05-05 |
| 8733953 | Display apparatus and projection type lighting apparatus therefor | Koji Hirata, Masahiko Yatsu, Hidehiro Ikeda | 2014-05-27 |
| 8573787 | Projection type display apparatus | Koji Hirata, Masahiko Yatsu | 2013-11-05 |
| 8408717 | Projection type image display apparatus | Koji Hirata, Masahiko Yatsu | 2013-04-02 |
| 8403504 | Projection type display apparatus | Koji Hirata, Masahiko Yatsu | 2013-03-26 |
| 8313199 | Projection display system including lens group and reflecting mirror | Koji Hirata, Masahiko Yatsu, Masayuki Ohki | 2012-11-20 |
| 8182097 | Projection type image display apparatus | Koji Hirata, Masahiko Yatsu | 2012-05-22 |
| 8169708 | Projecting optical unit and projecting type image display apparatus therewith | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata, Naoyuki Ogura | 2012-05-01 |
| 8113663 | Projection image display apparatus and projection optical unit to be used therein | Masahiko Yatsu, Koji Hirata | 2012-02-14 |
| 8020999 | Projection type image display apparatus | Koji Hirata, Masahiko Yatsu | 2011-09-20 |
| 8002417 | Projection-type image display apparatus | Koji Hirata, Masahiko Yatsu | 2011-08-23 |
| 8002418 | Projection type image display apparatus | Koji Hirata, Masahiko Yatsu | 2011-08-23 |
| 7961400 | Projecting optical unit and projecting type image display apparatus therewith | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata, Naoyuki Ogura | 2011-06-14 |
| 7914153 | Projection type image display apparatus | Koji Hirata, Masahiko Yatsu | 2011-03-29 |
| 7901097 | Display apparatus and projection type lighting apparatus therefor | Koji Hirata, Masahiko Yatsu, Hidehiro Ikeda | 2011-03-08 |
| 7896507 | Projection type display apparatus | Koji Hirata, Masahiko Yatsu | 2011-03-01 |
| 7857462 | Projection optical unit, projection-type image displaying apparatus and projection-type image displaying system | Koji Hirata, Masahiko Yatsu | 2010-12-28 |
| 7850313 | Projection type image display apparatus | Koji Hirata, Masahiko Yatsu | 2010-12-14 |
| 7780296 | Projection optical unit, projection-type image displaying apparatus and projection-type image displaying system | Koji Hirata, Masahiko Yatsu | 2010-08-24 |
| 7766487 | Projection-type image display apparatus | Koji Hirata, Masahiko Yatsu | 2010-08-03 |
| 7766488 | Projection type image display apparatus | Koji Hirata, Masahiko Yatsu | 2010-08-03 |
| 7701639 | Projection type image display apparatus | Koji Hirata, Masahiko Yatsu | 2010-04-20 |
| 7675679 | Image display device and Fresnel lens sheet used therefor | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata, Daisuke Imafuku | 2010-03-09 |
| 7670007 | Projection display, projection optical system and transmission lens or free curved lens | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata, Naoyuki Ogura | 2010-03-02 |
| 7589904 | Projection type image display device | Daisuke Imafuku, Hiroki Yoshikawa | 2009-09-15 |