Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7697202 | Screen, fresnel lens sheet used for the same, and image display apparatus using the same | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2010-04-13 |
| 7675679 | Image display device and Fresnel lens sheet used therefor | Hiroki Yoshikawa, Takanori Hisada, Tetsu Ohishi, Koji Hirata | 2010-03-09 |
| 7589904 | Projection type image display device | Takanori Hisada, Hiroki Yoshikawa | 2009-09-15 |
| 7581838 | Optical projector and image display apparatus using the same | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2009-09-01 |
| 7551352 | Image display apparatus, as well as, Fresnel lens sheet and screen to be used therein | Tetsu Ohishi, Hiroki Yoshikawa, Takanori Hisada, Koji Hirata, Masahiko Yatsu | 2009-06-23 |
| 7529023 | Image display, Fresnel lens and screen | Hiroki Yoshikawa, Tetsu Ohishi | 2009-05-05 |
| 7460301 | Image display apparatus, and transmissive screen and reflecting mirror used for same | Hiroki Yoshikawa, Tetsu Ohishi | 2008-12-02 |
| 7440186 | Screen, a fresnel lens sheet used for the screen, and an image display apparatus using the screen | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2008-10-21 |
| 7436593 | Screen, fresnel lens sheet used therefor, and image display apparatus using the same | Tetsu Ohishi, Hiroki Yoshikawa, Koji Hirata | 2008-10-14 |
| 7433121 | Projection type image display apparatus | Koji Hirata, Naoyuki Ogura | 2008-10-07 |
| 7403335 | Screen, Fresnel lens sheet used for the same, and image display apparatus using the same | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2008-07-22 |
| 7362503 | Screen, Fresnel lens sheet used for the same, and image display apparatus using the same | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2008-04-22 |
| 7261421 | Optical projector and image display apparatus using the same | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2007-08-28 |
| 7245429 | Image display device, rear projection type screen used in image display device, Fresnel lens sheet, and method of making Fresnel lens sheet | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2007-07-17 |
| 7095558 | Image display device, rear projection type screen used in image display device, Fresnel lens sheet, and method of making Fresnel lens sheet | Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata | 2006-08-22 |
| 6768594 | Projection lens apparatus and rear projection type image display apparatus using the same | Naoyuki Ogura, Kazunari Nakagawa, Koji Hirata, Hidehiro Ikeda, Shuji Kato | 2004-07-27 |