Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8007116 | Video projection device having a converter lens attachably and detachably provided | Tokuji Matsuda | 2011-08-30 |
| 7862180 | Optical system for image projection and image projection apparatus | Kohtaro Hayashi | 2011-01-04 |