Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877698 | Electrophotographic process for generating two-color images using liquid developer | Ian D. Morrison, Melvin D. Croucher | 1989-10-31 |
| 4804601 | Electrophotographic and electrographic imaging processes | Henry R. Till, Melvin D. Croucher | 1989-02-14 |