Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4685709 | Deadlocked latch having disc and motor actuators | — | 1987-08-11 |
| 4679416 | Trigger and latch bolt assembly | — | 1987-07-14 |
| 4640112 | Security door knob and escutcheon | — | 1987-02-03 |
| 4562664 | Door position monitor with automatic adjustment | — | 1986-01-07 |
| 4429556 | Lock mechanism | — | 1984-02-07 |
| 4334388 | Door position monitoring assembly | — | 1982-06-15 |
| 4237711 | Lock mechanism | — | 1980-12-09 |
| 4211443 | Electric strike | Lawrence D. Butts | 1980-07-08 |