Top Inventors at Sioux Steel All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Leroy B. Stumpe | 9 |
| 2 | Brian Andrew Schuelke | 7 |
| 3 | William A. Witt | 5 |
| #4 | Brent J. Bloemendaal | 4 |
| #5 | Eric Schuld | 4 |
| #6 | Chris Nelson | 3 |
| #7 | Donald J. Siglin | 3 |
| #8 | Elliott Strain | 3 |
| #9 | Robert E. Hardy | 3 |
| #10 | Scott L. Schmidt | 3 |
| #11 | Andrew Grass | 3 |
| #12 | Gary D. Seeba | 2 |
| #13 | John Steever | 2 |
| #14 | Keith Polzin | 2 |
| #15 | Matt Palmlund | 2 |
| #16 | Terry A. Adams | 2 |
| #17 | William H. Hockenberry, Jr. | 2 |
| #18 | Bill Witt | 1 |
| #19 | Charles L. Hammond | 1 |
| #20 | David A. Ver Steeg | 1 |
| #21 | Gerry D. Breen | 1 |
| #22 | Gary Hoover | 1 |
| #23 | Joe Harrenstein | 1 |
| #24 | Kelly Ward | 1 |
| #25 | Michael D. Schram | 1 |
| #26 | Michael Sjoblom | 1 |
| #27 | Monte L. Peters | 1 |
| #28 | Richard W. Wickstrom | 1 |
| #29 | Troy W. Whitley | 1 |
| #30 | William W. Cooper | 1 |
| #31 | Jon Duesterhoeft | 1 |
| #32 | David A. Kocak | 1 |
| #33 | James Torbick | 1 |
| #34 | Rick G. Klinkhammer | 1 |
| #35 | Duane J. Walhof | 1 |
| #36 | Richard R. Klock | 1 |
| #37 | Delmar E. Ostrem | 1 |