Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4469152 | Dust-tight hatch closure assembly | Robert E. Wagner | 1984-09-04 |
| D271789 | Hatch cover with pneumatic seal for mobile or stationary storage tanks | Robert E. Wagner | 1983-12-13 |