Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7324169 | Projection optical system, projection television, and method of manufacturing lens included in projection optical system | Seok-il Yoon, Sung-Gi Kim, Young-il Kah | 2008-01-29 |
| 7233440 | Image display screen having wide vertical and horizontal viewing angles and projection television including the same | Seok-il Yoon, Sung-Gi Kim | 2007-06-19 |
| 7139124 | Wide viewing angle screen and projection television comprising the same | Seok-il Yoon | 2006-11-21 |
| 6995811 | Brightness improving apparatus for projection television | Seok-il Yoon | 2006-02-07 |
| 6992837 | Hybrid lens and projection optical system including the same | Seok-il Yoon, Alexandr F. Shirankov, Oleg Vladimirovich Rozhkov, Vadim Pozdnyakov, Alexey Khorokhorov | 2006-01-31 |
| 6859314 | Rear projection screen and projector adopting the same | Seok-il Yoon | 2005-02-22 |
| 6603604 | Screen for projection television | — | 2003-08-05 |