Top Inventors at H.C. Duke & Son All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Kyle B. Elsom | 6 |
| 2 | James A. Quandt | 4 |
| 3 | Dustin Meyermann | 2 |
| #4 | Gary Paul Almblade | 2 |
| #5 | Mark L. Davis | 2 |
| #6 | Brian Mathews | 1 |
| #7 | Daniel Duke | 1 |
| #8 | Greg S. Smart | 1 |
| #9 | Ji Won Oh | 1 |
| #10 | Jim Quandt | 1 |
| #11 | Joshua Michael Otto | 1 |
| #12 | Kenneth J. Emody | 1 |
| #13 | Lex Greenway | 1 |
| #14 | Michael A. Graef | 1 |
| #15 | Sean McKay | 1 |
| #16 | Alexis Grabill | 1 |