Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7086670 | Lock for bi-directional doors | — | 2006-08-08 |
| 7052054 | Electric drop bolt with slidable drive mechanism | — | 2006-05-30 |
| 6609400 | Delayed egress systems | — | 2003-08-26 |
| 6125673 | Electronic cylinder lock and computer security system | — | 2000-10-03 |
| 5690373 | Electromagnetic lock | — | 1997-11-25 |
| 5219196 | Locks | — | 1993-06-15 |
| 4969343 | Security locks | — | 1990-11-13 |
| 4682799 | Latch lock mechanism | — | 1987-07-28 |
| 4490624 | Door control apparatus | — | 1984-12-25 |
| 4338066 | Grease gun | — | 1982-07-06 |
| D257739 | Grease pump | — | 1980-12-30 |