Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4731905 | Overhead door torsion spring assembly and method | Coy H. Burgess, William F. Wadsworth | 1988-03-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4731905 | Overhead door torsion spring assembly and method | Coy H. Burgess, William F. Wadsworth | 1988-03-22 |