Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6110052 | Apparatus and method for analyzing bowling technique | David G. Sprager, Larry M. Vezina, James M. Donovan | 2000-08-29 |
| 4674745 | Bowling lane surface | — | 1987-06-23 |
| 4640511 | Bowling ball return mechanism | — | 1987-02-03 |