Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5633109 | Ink compositions with liposomes containing photochromic compounds | Marcel P. Breton, MaryAnna Isabella, Eric Gerard Johnson, Trevor I. Martin, John F. Oliver | 1997-05-27 |
| 5593486 | Photochromic hot melt ink compositions | John F. Oliver, Trevor I. Martin, Eric Gerard Johnson, Stephan V. Drappel | 1997-01-14 |