Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5529615 | Marking material and method for suspending pigment particles | William Grandmont | 1996-06-25 |
| 5453120 | Erasable marking material and a method for the manufacture thereof | William Grandmont | 1995-09-26 |
| 5116533 | Phosphorescent marking material | William Grandmont | 1992-05-26 |