Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8152578 | Drive train coupling | Cheryl D. Rigby | 2012-04-10 |
| 7207855 | Joint | — | 2007-04-24 |
| 6247979 | Inboard/outboard boat drive | — | 2001-06-19 |
| 5408774 | Countertop adjustable and changeable sign holder | Ronald E. Grewe | 1995-04-25 |