Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4521910 | Multiwall cooler bag | Stephen C. Keppel, Stephen R. Salt | 1985-06-04 |
| 4344558 | Pinch bottom valve bag | Fred B. Wilharm | 1982-08-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4521910 | Multiwall cooler bag | Stephen C. Keppel, Stephen R. Salt | 1985-06-04 |
| 4344558 | Pinch bottom valve bag | Fred B. Wilharm | 1982-08-17 |