Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839267 | Colour photographic motion picture element | Marcel J. Monbaliu | 1989-06-13 |
| 4822729 | 2,5-Diacylaminophenol-type color couplers and photographic elements containing same | Marcel J. Monbaliu | 1989-04-18 |