Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |