Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7460300 | Projection-type picture display apparatus and screen used thereby | Koji Hirata | 2008-12-02 |
| 7221507 | Projection-type picture display apparatus and screen used thereby | Koji Hirata | 2007-05-22 |
| 7023616 | Projection-type picture display apparatus and screen used thereby | Koji Hirata | 2006-04-04 |
| 6829031 | Liquid crystal display apparatus and optical device for use therein | Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Naoyuki Ogura +3 more | 2004-12-07 |
| 6728031 | Projection-type picture display apparatus and screen used thereby | Koji Hirata | 2004-04-27 |
| 6535267 | Liquid crystal display apparatus having liquid crystal display element immersed in cooling medium | Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Naoyuki Ogura +3 more | 2003-03-18 |
| 6502942 | Rear projection display apparatus and translucent screen for use therein | Shigeru Mori, Yoji Nakayama, Kazunari Nakagawa | 2003-01-07 |
| 6256083 | Liquid crystal display apparatus and optical device for use therein | Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Naoyuki Ogura +3 more | 2001-07-03 |
| 5272540 | Temperature compensating lens system for projection television | Koji Hirata, Hiroki Yoshikawa, Tooru Numata, Kiyoshi Wada, Masayuki Muranaka +2 more | 1993-12-21 |
| 5200814 | Video projector with optical color balance | Koji Hirata, Hiroki Yoshikawa, Takahiko Yoshida, Tooru Numata, Masayuki Muranaka +2 more | 1993-04-06 |
| 4948237 | Projection lens system | Koji Hirata, Kyohei Fukuda, Hiroki Yoshikawa, Shigeru Mori, Masayuki Muranaka +2 more | 1990-08-14 |