Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5220040 | Mixed and mixed crystal benzodefuranone dyes | David Brierley, James F. Bullock, Nigel Hughes, Prakash Patel | 1993-06-15 |
| 4916769 | Disperse mono-azo dye mixture for dyeing synthetic textiles | David Brierley, Barry Huston Meyrick | 1990-04-17 |