Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10663252 | Shoulder-fired firearm primary and secondary recoil attenuator | Ronald J. Sprainis | 2020-05-26 |
| 8672151 | Elastomeric draft gear for a railcar | Ronald J. Sprainis, Peter Paul Gregar | 2014-03-18 |