Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10646766 | Golf swing training device | Richard Zimmerman, Harold Bowman Blach, Jr., David Lee Stone, Joseph E. Austin | 2020-05-12 |
| 9283463 | Golf swing training apparatus | Richard Zimmerman, David Lee Stone, Joseph E. Austin | 2016-03-15 |