Patents per Year
Top Inventors at Ritchie Industries All Time
Showing 1–11 of 11 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Gerald L. Knief | 5 |
| 1 | Jerry D. Peterson | 5 |
| 3 | Michael R. Gerbo | 4 |
| #4 | Daryl Hertema | 1 |
| #4 | David J. Vavra | 1 |
| #4 | Eric David Sieverding | 1 |
| #4 | Larry Cole | 1 |
| #4 | Leland G. Wiseman | 1 |
| #4 | Robert John Amundson | 1 |
| #4 | Tad D. Upah | 1 |
| #4 | Warren E. Bishop | 1 |