Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667638 | Method of enhancing the opacity of printing papers and paper produced thereof | Bernard F. North | 1997-09-16 |
| 5591489 | Process for surface sizing paper or paperboard | John P. Farewell | 1997-01-07 |