Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4944169 | Closure lock | Norman H. Cant, Cecil M. Garrow | 1990-07-31 |
| 4823531 | Hinged closure panel with separate hinge member | — | 1989-04-25 |
| 4748783 | Hinged closure panel with integral hinge member | — | 1988-06-07 |
| 4664170 | Rolling firedoor | — | 1987-05-12 |
| 4633927 | Barrel rings | — | 1987-01-06 |
| 4628982 | Insulated closure panel | — | 1986-12-16 |
| 4586552 | Rolling closure guide means | — | 1986-05-06 |
| 4571889 | Rolling closure bottom seal | — | 1986-02-25 |