Issued Patents All Time
Showing 26–50 of 65 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7059725 | 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 | 2006-06-13 |
| 6980452 | Associative memory having a mask function for use in a network router | — | 2005-12-27 |
| 6956624 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Koji Hirata, Masahiko Yatsu, Hidehiro Ikeda | 2005-10-18 |
| 6956756 | Associative memory, method for searching the same, network device, and network system | — | 2005-10-18 |
| 6910105 | Associative memory having a mask function for use in a network router | — | 2005-06-21 |
| 6894729 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Koji Hirata, Masahiko Yatsu, Hidehiro Ikeda | 2005-05-17 |
| 6869184 | Polarized-light converting unit and projector using the same | Masahiko Yatsu, Koji Hirata | 2005-03-22 |
| 6829031 | Liquid crystal display apparatus and optical device for use therein | Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Shigeru Inaoka +3 more | 2004-12-07 |
| 6801366 | Projection lens system and projection image display apparatus using the same | Koji Hirata, Shigeru Mori, Takahiro Yoshida, Kazunari Nakagawa | 2004-10-05 |
| 6768594 | Projection lens apparatus and rear projection type image display apparatus using the same | Daisuke Imafuku, Kazunari Nakagawa, Koji Hirata, Hidehiro Ikeda, Shuji Kato | 2004-07-27 |
| 6624950 | Projection lens system and projection image display apparatus using the same | Koji Hirata, Shigeru Mori, Takahiro Yoshida, Kazunari Nakagawa | 2003-09-23 |
| 6573950 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Koji Hirata, Masahiko Yatsu, Hidehiro Ikeda | 2003-06-03 |
| 6570866 | High-speed flexible longest match retrieval | Tutomu Murase | 2003-05-27 |
| 6542308 | Projection display apparatus and projection lens device for use therein | Koji Hirata, Shigeru Mori, Yasuo Otsuka | 2003-04-01 |
| 6535267 | Liquid crystal display apparatus having liquid crystal display element immersed in cooling medium | Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Shigeru Inaoka +3 more | 2003-03-18 |
| 6396641 | Projection lens system and projection image display apparatus using the same | Koji Hirata, Shigeru Mori, Takahiro Yoshida, Kazunari Nakagawa | 2002-05-28 |
| 6342929 | Projection image display apparatus | Koji Hirata, Kazunari Nakagawa, Tomoharu Nakiri, Chihiro Egawa | 2002-01-29 |
| 6299313 | Projection display apparatus and projection lens device for use therein | Koji Hirata, Shigeru Mori, Yasuo Otsuka | 2001-10-09 |
| 6295576 | Associative memory having a mask function for use in a network router | Tutomu Murase | 2001-09-25 |
| 6256083 | Liquid crystal display apparatus and optical device for use therein | Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Shigeru Inaoka +3 more | 2001-07-03 |
| 6243211 | Projection lens system and projection image display apparatus using the same | Koji Hirata, Shigeru Mori, Takahiro Yoshida, Kazunari Nakagawa | 2001-06-05 |
| 6144574 | Associative memory with a shortest mask output function and search method | Masayoshi Kobayashi, Tutomu Murase, Atsushi Kuriyama | 2000-11-07 |
| 6138138 | High speed multiple determination apparatus | — | 2000-10-24 |
| 6130786 | Projection lens and image display device | Atsuo Osawa, Hiroki Yoshikawa, Shigeru Mori | 2000-10-10 |
| 6124979 | Projection display apparatus and projection lens device for use therein | Koji Hirata, Shigeru Mori, Yasuo Otsuka | 2000-09-26 |