Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE37304 | Surgical knife blade | Anthony Van Heugten | 2001-07-31 |
| 5747230 | Photographic silver halide colour material having improved granularity and dye hue | John Kenneth Charles Kempster, Gareth B. Evans | 1998-05-05 |
| 5713915 | Surgical knife blade | Anthony Van Heugten | 1998-02-03 |
| 5380632 | Photosensitive photographic silver halide color materials | Peter D. Marsden, John Kenneth Charles Kempster | 1995-01-10 |