Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11002065 | Sealing system for a conditioned door threshold | George F. Balbach, Steven Spitz, William B. Weishar | 2021-05-11 |
| 7819729 | Air curtain doorway | Stephen R. Rohrer | 2010-10-26 |
| 7296608 | Impactable door | William B. Weishar | 2007-11-20 |