Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6573950 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Koji Hirata, Naoyuki Ogura, Masahiko Yatsu | 2003-06-03 |
| 6560041 | Projection lens apparatus and projection type image display apparatus | Masahiko Yatsu, Koji Hirata, Junichi Ikoma | 2003-05-06 |