Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847655 | Highlight color imaging apparatus | Delmer G. Parker, William Maxwell Allen, Jr. | 1989-07-11 |
| 4811046 | Tri-level highlight color printing apparatus with cycle-up and cycle-down control | — | 1989-03-07 |