Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4536219 | Thermographic recording compositions | Claude R. Riou | 1985-08-20 |
| 4482378 | Color developers and thermographic record compositions containing them | Claude R. Riou | 1984-11-13 |