Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D401125 | Post hole digger blade | David R. Bonnes | 1998-11-17 |
| 5558379 | Implement having an ergonomic step | — | 1996-09-24 |
| 4752308 | Process for the reconditioning of quench water | Adrian Brandl, Heinz Keller | 1988-06-21 |