Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10646766 | Golf swing training device | Richard Zimmerman, Harold Bowman Blach, Jr., David Lee Stone, Philip Mark Walker | 2020-05-12 |
| 9283463 | Golf swing training apparatus | Richard Zimmerman, David Lee Stone, Philip Mark Walker | 2016-03-15 |
| 9271591 | Kilt hanger | — | 2016-03-01 |