Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5326020 | Rigid paperboard container | James O. Cheshire, Mark B. Littlejohn, Erland Sandstrom | 1994-07-05 |
| 4721499 | Method of producing a rigid paperboard container | Ronald P. Marx, Patrick H. Wnek | 1988-01-26 |