Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695923 | Radiation-sensitive silver halide grains internally containing a discontinuous crystal phase | Donald L. Black | 1997-12-09 |
| 5667954 | Photographic emulsions of enhanced sensitivity and reduced contrast | Donald L. Black | 1997-09-16 |