Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7832778 | Delayed egress exit device | Andrew Whitaker, John Steven Gray, Sidney J. Lampley, Michael Ensley | 2010-11-16 |
| 7469942 | Delayed egress exit device | Andrew Whitaker, J. Steven Gray, Sidney J. Lampley, Michael Ensley | 2008-12-30 |
| 6427387 | Removable mullion assembly | — | 2002-08-06 |
| 5816017 | Fire retardant door and exit device for same | Daniel L. Hibbs, Mark Alvin Mason | 1998-10-06 |
| 5042851 | Exit device having adjustable concealed rods | — | 1991-08-27 |
| 4305612 | Apparatus for operating a door latching and unlatching device | John R. Foster | 1981-12-15 |