Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5180076 | Waste container | — | 1993-01-19 |
| 4930648 | Triple seal molded outlet for plastic storage container | — | 1990-06-05 |
| D305259 | Industrial container | William J. Granberg, Richard A. Wagner | 1989-12-26 |
| 4709833 | Rotationally molded salvage drum and recessed lid | William J. Granberg, Richard A. Wagner | 1987-12-01 |