Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D266005 | Calculator keyboard module | John N. Johnston | 1982-08-31 |
| D257512 | Calculator case | Terry L. Barner, Stuart D. Leer | 1980-11-11 |
| D257513 | Case for calculating machine | Joseph C. Sereika | 1980-11-11 |
| D255567 | Ribbon cassette | — | 1980-06-24 |