Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6798584 | Lens apparatus for projection | Susumu Matsumoto, Kumajiro Sekine, Yasuhiro Sekine | 2004-09-28 |
| 6552859 | Lens apparatus for projection | Susumu Matsumoto, Kumajiro Sekine, Yasuhiro Sekine | 2003-04-22 |