Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4582381 | Electrical interlock | Thomas M. Paulson | 1986-04-15 |
| 4273456 | Paper insertion apparatus for a typewriter | Robert R. Lisk, William R. McCray, James L. Sizemore | 1981-06-16 |
| 4272205 | Signal controlled indexing rate shifter for a typewriter | Charles D. Bleau | 1981-06-09 |