Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4957380 | Tab adjust function for an electronic typewriter to permit the shifting of tabs from a first to a second format | Patrick J. Gerstle, Mac A. Mathis, David R. Smith | 1990-09-18 |
| 4889439 | Automatic page end feature for an electronic typewriter | Sherry Anderson Cook, Patrick J. Gerstle, David R. Smith | 1989-12-26 |