Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869996 | Process for preparing negative images on a positive-type tonable photosensitive element | Eugene L. Grubb, Robert P. Held, Howard Matrick, Bohdan Rakoczy | 1989-09-26 |
| 4276366 | Process of using positive and negative working imaging systems from photoactive plastisols | William J. Nebe | 1981-06-30 |
| 4251618 | Positive and negative working imaging systems from photoactive plastisols | William J. Nebe | 1981-02-17 |