Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6390414 | Self-adjusting air intake | — | 2002-05-21 |
| 6181476 | Light collimating and distributing apparatus | William A. Parkyn | 2001-01-30 |
| 6166860 | Screen illumination apparatus and method | William A Parnyn | 2000-12-26 |
| 5757557 | Beam-forming lens with internal cavity that prevents front losses | William A. Parkyn | 1998-05-26 |