Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10989136 | Parent bore cylinder block of an opposed-piston engine | Andrew P. Perr, John J. Koszewnik | 2021-04-27 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10989136 | Parent bore cylinder block of an opposed-piston engine | Andrew P. Perr, John J. Koszewnik | 2021-04-27 |