Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6605144 | High light- fastness yellow composition | Janette Watkinson, Paul Wight | 2003-08-12 |
| 6267806 | Dye compositions | Aidan Joseph Lavery | 2001-07-31 |
| 5370730 | Dye composition and aqueous ink derived therefrom | Peter Gregory, Ronald Wynford Kenyon | 1994-12-06 |
| 5171848 | Salts of black trisazo dyes with alkyl amines having good solubility in organic liquids | David Greenwood, Peter Gregory | 1992-12-15 |
| 4767459 | Ink | David Greenwood | 1988-08-30 |