Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8007116 | Video projection device having a converter lens attachably and detachably provided | Shigeru Sawamura | 2011-08-30 |
| 7612951 | Projection lens unit | Atsuo Masui, Kohei Wataru | 2009-11-03 |