Top Inventors at Marshalltown Trowel All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Curtis D. Kelsay | 7 |
| 2 | Duane W. Woltjen | 4 |
| 3 | Jack D. Murders | 4 |
| #4 | Kent Douglas Williams | 3 |
| #5 | Larry J. McComber | 2 |
| #6 | Alan Jerome Ness | 2 |
| #7 | Georgia Pyatt | 1 |
| #8 | Herbert C. Glesmann | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Curtis D. Kelsay | 7 |
| 2 | Duane W. Woltjen | 4 |
| 3 | Jack D. Murders | 4 |
| #4 | Kent Douglas Williams | 3 |
| #5 | Larry J. McComber | 2 |
| #6 | Alan Jerome Ness | 2 |
| #7 | Georgia Pyatt | 1 |
| #8 | Herbert C. Glesmann | 1 |