Issued Patents All Time
Showing 76–77 of 77 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4294914 | Photographic bleach compositions and methods of photographic processing | — | 1981-10-13 |
| 4293638 | Method for alleviating partial inactivation of color couplers | Gerald I. P. Levenson | 1981-10-06 |