Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872023 | Plotter platen mapping system | Ralph J. Lake, Jr., A. Daniel Coby, John Pluth, Jr. | 1989-10-03 |
| 4800402 | Plotter paper sizing system | Ralph J. Lake, Jr., A. Daniel Coby, John Pluth, Jr. | 1989-01-24 |