Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8113970 | Batting aid device having automatic ball feed | Gregory Knutson, James E. Mauer | 2012-02-14 |
| 7794340 | Adjustable length training bat | Gregory Knutson, James E. Mauer | 2010-09-14 |
| 6974396 | Batting aid device | Gregory Knutson, James E. Mauer | 2005-12-13 |