Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7832778 | Delayed egress exit device | Andrew Whitaker, John Steven Gray, Larry R. Hunt, Sidney J. Lampley | 2010-11-16 |
| 7469942 | Delayed egress exit device | Andrew Whitaker, J. Steven Gray, Sidney J. Lampley, Larry R. Hunt | 2008-12-30 |