Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881839 | Portable electronic data handling/data entry system | — | 1989-11-21 |
| 4881840 | Printer having paper-out and column zero detection mechanism | Mark A. Rendon, Erik A. Treszoks | 1989-11-21 |