Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5644352 | Multicolor heat-sensitive verification and highlighting system | John C. H. Chang, Vance P. Gregory, Jr. | 1997-07-01 |
| 5618063 | Multicolor heat-sensitive verification and highlighting system | John C. H. Chang, Vance P. Gregory, Jr. | 1997-04-08 |