Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6311454 | Door construction | — | 2001-11-06 |
| 4631866 | Composite non-handed door jamb construction | Ronald F. Otto | 1986-12-30 |
| 4518026 | Energy efficient garage door construction and the like | Ronald F. Otto | 1985-05-21 |
| 4489459 | Adjustable hinge construction including spring clips for prefab door and jamb assemblies | — | 1984-12-25 |
| 4379480 | Energy efficient garage door construction and the like | Ronald F. Otto | 1983-04-12 |