Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6383711 | High contrast photographic silver halide material | Jurjen Frederik Winkel | 2002-05-07 |
| 5512415 | High contrast photographic silver halide material | Allison Hazel C. Dale, Roger H. Piggin, David Beaumond | 1996-04-30 |