Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5115234 | Keypad controller for copier-duplicator | John M. Persel, David N. Widmann | 1992-05-19 |
| 5065426 | Facsimile/telephone controller | Harvey Greenstein, Edward G. Newman, JR., John M. Persel, David N. Widmann | 1991-11-12 |