Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4561918 | Method of manufacturing corrugated paperboard product using a foamed adhesive | Paul M. Scharfenberg | 1985-12-31 |
| 4495011 | Method of manufacturing dual arch corrugated paperboard product | Paul M. Scharfenberg | 1985-01-22 |