Top Inventors at Datafile Limited All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Donald T. Barber | 12 |
| 2 | George B. Pfeffer | 5 |
| 3 | Dale Lee Anderson | 3 |
| #4 | Erhard P. Walter | 2 |
| #5 | Esther E. Olson | 1 |
| #6 | Thomas C. Scrymgeour | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Donald T. Barber | 12 |
| 2 | George B. Pfeffer | 5 |
| 3 | Dale Lee Anderson | 3 |
| #4 | Erhard P. Walter | 2 |
| #5 | Esther E. Olson | 1 |
| #6 | Thomas C. Scrymgeour | 1 |