Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5397526 | Method for reconfiguring finishing rolls in a plastic sheet fabrication sheetline | James H. Perkins, Charles C. Treisch, Jr., William N. Calland | 1995-03-14 |
| 4997358 | Apparatus for reconfiguring finishing rolls in a plastic sheet fabrication sheetline | James H. Perkins, Charles C. Treisch, Jr., William N. Calland | 1991-03-05 |