Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5160171 | Security coding | Peter Gregory | 1992-11-03 |
| 4994111 | Ink-jet ink containing lithium salt of copper complex monoazo dye | Cecil V. Stead | 1991-02-19 |
| 4931550 | Lithium salt of copper complex monoazo dye | Cecil V. Stead | 1990-06-05 |