Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360688 | Composite black and white substrate for color proofing films | Robert J. von Trebra | 1994-11-01 |
| 5288570 | Composite black and white substrate for color proofing films | Robert J. von Trebra | 1994-02-22 |