Showing 1–3 of 3 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Andrew F. Johnke | Ortloff Engineers | 4 |
| 2 | John D. Preheim | Raven Industries | 1 |
| 2 | Sean Coffman | Full-Swing Golf | 1 |
Part of South Dakota
6 patents · 3 inventors
Ranked #13,281 of 44,107 cities Top 35%
Showing 1–3 of 3 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Andrew F. Johnke | Ortloff Engineers | 4 |
| 2 | John D. Preheim | Raven Industries | 1 |
| 2 | Sean Coffman | Full-Swing Golf | 1 |
Part of South Dakota