Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE39504 | Counterbalance system for upward acting door | John E. Scates, Leroy G. Krupke, Richard K. Hoofard | 2007-03-13 |
| 6134835 | Counterbalance system for upward acting door | Leroy G. Krupke, John E. Scates, Richard K. Hoofard | 2000-10-24 |
| 6098697 | Sectional door with pinch resistant hinge between door sections | Leroy G. Krupke, W. Mark Megarity | 2000-08-08 |