Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5239777 | Overhead door pre-loaded and pre-assembled torsion spring counterbalance assembly | — | 1993-08-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5239777 | Overhead door pre-loaded and pre-assembled torsion spring counterbalance assembly | — | 1993-08-31 |