Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821073 | Method and apparatus for measuring characteristics of photographic negatives | Patrick A. Cosgrove | 1989-04-11 |
| 4809064 | Enlarging photographic printer | Shaun M. Amos, Thomas C. Jessop | 1989-02-28 |