Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5568921 | Racquet stringing machine | John Francis Lorentzen, Todd Colburn | 1996-10-29 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5568921 | Racquet stringing machine | John Francis Lorentzen, Todd Colburn | 1996-10-29 |