Issued Patents All Time
Showing 51–59 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5016929 | Electromagnetic shear lock | — | 1991-05-21 |
| 4981312 | Electromagnetic shear lock | — | 1991-01-01 |
| 4957316 | Armature for electromagnetic lock | — | 1990-09-18 |
| 4904005 | Entrance security system | — | 1990-02-27 |
| 4861080 | Support for electromagnetic shear lock armature | — | 1989-08-29 |
| 4843851 | Locking mechanism for multifunctional electronic lock | — | 1989-07-04 |
| 4839508 | Card reader | — | 1989-06-13 |
| 4783882 | Door closer assembly | — | 1988-11-15 |
| D295366 | Door closer arm assembly | — | 1988-04-26 |