Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11330753 | Drum style rotary tiller | Mark G. Ruppel, Randy L. Schamberger, Robert J. Ruppel | 2022-05-17 |
| 10398071 | Drum style rotary tiller | Mark G. Ruppel, Randy L. Schamberger, Robert J. Ruppel | 2019-09-03 |
| 9730371 | Drum style rotary tiller | Mark G. Ruppel, Randy L. Schamberger, Robert J. Ruppel | 2017-08-15 |
| 9307687 | Drum style rotary tiller | Mark G. Ruppel, Randy L. Schamberger, Robert J. Ruppel | 2016-04-12 |
| 7823578 | High efficiency biomass stove | Robert J. Ruppel, Michael Avery, David Hare, David J. Lynch, Scott NICKELL | 2010-11-02 |