Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8863872 | Electrically powered bumper cars comprising multiple drive wheels and integral hub motors | John J. Dean, Michael L. Sweringen | 2014-10-21 |
| 7607500 | Internally electrically powered bumper cars comprising multiple drive wheels and integral hub motors | Michael L. Sweringen, John J. Dean | 2009-10-27 |