Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869996 | Process for preparing negative images on a positive-type tonable photosensitive element | Peter J. McCartin, Eugene L. Grubb, Robert P. Held, Bohdan Rakoczy | 1989-09-26 |