Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4356252 | Photosensitive negative-working tonable element | — | 1982-10-26 |
| 4343893 | Masked development/image modifier compounds of silver photographic systems | Dennis S. Donald | 1982-08-10 |