Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5879413 | Cationic diazo dyes for the dyeing of hair | Roger W. Pengilly, Roger G. J. C. Twigg | 1999-03-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5879413 | Cationic diazo dyes for the dyeing of hair | Roger W. Pengilly, Roger G. J. C. Twigg | 1999-03-09 |