Issued Patents All Time
Showing 1–25 of 65 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9429832 | Oblique projection optical system and projection type display apparatus using the same | Koji Hirata, Masahiko Yatsu | 2016-08-30 |
| 8690349 | Oblique projection optical system and projection type display apparatus using the same | Koji Hirata, Masahiko Yatsu | 2014-04-08 |
| 8690345 | Projection image display apparatus having a first lens and a second lens adjacent to the screen | Koji Hirata, Masahiko Yatsu, Hidehiro Ikeda | 2014-04-08 |
| 8585216 | Video projector which obliquely projects images onto screen | Chohei Ono, Koji Hirata, Masahiko Yatsu, Masayuki Fukui, Megumi KURACHI | 2013-11-19 |
| 8425049 | Oblique projection optical system and projection type display apparatus using the same | Koji Hirata, Masahiko Yatsu | 2013-04-23 |
| 8169708 | Projecting optical unit and projecting type image display apparatus therewith | Hiroki Yoshikawa, Takanori Hisada, Tetsu Ohishi, Koji Hirata | 2012-05-01 |
| 8082360 | Associative memory having a mask function for use in a network device | — | 2011-12-20 |
| D647931 | Lens for projector | Masayuki Fukui, Masahiko Yatsu, Koji Hirata, Masanori Tsumura | 2011-11-01 |
| D645068 | Lens for projector | Masayuki Fukui, Masahiko Yatsu, Koji Hirata, Masanori Tsumura | 2011-09-13 |
| 7961400 | Projecting optical unit and projecting type image display apparatus therewith | Hiroki Yoshikawa, Takanori Hisada, Tetsu Ohishi, Koji Hirata | 2011-06-14 |
| D639076 | Mirror for projector | Masayuki Fukui, Masahiko Yatsu, Koji Hirata, Masanori Tsumura | 2011-06-07 |
| 7761599 | Associative memory having a mask function for use in a network device | — | 2010-07-20 |
| 7670007 | Projection display, projection optical system and transmission lens or free curved lens | Takanori Hisada, Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2010-03-02 |
| 7586687 | Projecting optical unit and projecting type image display apparatus therewith | Hiroki Yoshikawa, Takanori Hisada, Tetsu Ohishi, Koji Hirata | 2009-09-08 |
| 7535648 | Projection type image display | Hiroki Yoshikawa, Takanori Hisada, Tetsu Ohishi, Koji Hirata | 2009-05-19 |
| 7433121 | Projection type image display apparatus | Daisuke Imafuku, Koji Hirata | 2008-10-07 |
| 7404646 | Projection lens apparatus and rear projection type image display apparatus | Yuriko Inadachi, Shuji Kato, Hidehiro Ikeda, Koji Hirata | 2008-07-29 |
| 7397682 | Associative memory having a mask function for use in network devices and network system | — | 2008-07-08 |
| 7397683 | Associative memory having a mask function for use in a network router | — | 2008-07-08 |
| 7347566 | Projection lens unit and rear projection type image display system | Hidehiro Ikeda, Shuji Kato, Koji Hirata | 2008-03-25 |
| 7287120 | Associative memory and its retrieving method and router and network system | — | 2007-10-23 |
| 7200712 | Associative memory system, network device, and network system | — | 2007-04-03 |
| 7172292 | Projection lens unit and rear projection type image display system | Hidehiro Ikeda, Shuji Kato, Koji Hirata | 2007-02-06 |
| 7111942 | Reflection-type image projection unit and a reflection-type image display apparatus, and a light source device for use therein | Koji Hirata, Masahiko Yatsu, Nobuo Masuoka | 2006-09-26 |
| 7081927 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Koji Hirata, Masahiko Yatsu, Hidehiro Ikeda | 2006-07-25 |