Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342720 | Color proofing element and process for making the same | Gregory L. Zwadlo | 1994-08-30 |
| 5124220 | Bilayer topcoats for organic photoconductive elements | David E. Brown, Susan K. Jongewaard, Gregory L. Zwadlo | 1992-06-23 |
| 5108865 | Offset transfer of toner images in electrography | Gregory E. Zwaldo, Donald Knutson | 1992-04-28 |
| 4260673 | Single sheet color proofing system | — | 1981-04-07 |