Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6868657 | Mowing machines with ergonomic hand control levers | Brian Bauer, Douglas Dean Korthals | 2005-03-22 |
| 6782964 | Mower | Douglas Dean Korthals, Randall Joseph Bischel | 2004-08-31 |