Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10920081 | Leuco dye pastel coloring kit | Terry Stovold | 2021-02-16 |
| 10597537 | Leuco dye pastel marking device | Terry Stovold | 2020-03-24 |
| 8822374 | Color-changing marking implement and substrate | Terry Stovold | 2014-09-02 |
| 8053494 | Invisible ink and scratch pad | Terry Stovold | 2011-11-08 |