Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683843 | Solid colored composition mutable by ultraviolet radiation | Ronald Sinclair Nohr, John Gavin MacDonald, Vincent D. McGinniss | 1997-11-04 |
| 5643701 | Electrophotgraphic process utilizing mutable colored composition | Ronald Sinclair Nohr, John Gavin MacDonald, Vincent D. McGinniss | 1997-07-01 |
| 5616443 | Substrate having a mutable colored composition thereon | Ronald Sinclair Nohr, John Gavin MacDonald, Vincent D. McGinniss | 1997-04-01 |