Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6066379 | Repulpable, water repellant paperboard | Tung C. Ma, Charles J. Davis, Bruce T. Watson | 2000-05-23 |
| 5635279 | Repulpable, water repellant paperboard | Tung C. Ma, Charles J. Davis, Bruce T. Watson | 1997-06-03 |
| 5626945 | Repulpable, water repellant paperboard | Tung C. Ma, Charles J. Davis | 1997-05-06 |
| 5110040 | Pour spout construction and method | Roderick W. Kalberer, Frederick J. Henkel | 1992-05-05 |