Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6790585 | Method for developing a high contrast photographic material containing a polyhydrazide nucleating agent | Jacques Roussilhe, Siu C. Tsoi, Llewellyn J. Leyshon | 2004-09-14 |
| 6713226 | High contrast photographic element containing a polyhydrazide nucleating agent | Llewellyn J. Leyshon | 2004-03-30 |