Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829326 | Registration system for an electrostic printer/plotter | John H. Hughes, Alan L. Zimmerman | 1989-05-09 |
| 4804979 | Single-pass color plotter | Peter Kamas, Douglas A. Hardy | 1989-02-14 |