Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10975527 | Railroad tie plugging system | Douglas Delmonico, Stephen R. Epps, Jacob Schmidt | 2021-04-13 |
| 9920488 | Railroad tie plugging system | Douglas Delmonico, Stephen R. Epps, Jacob Schmidt | 2018-03-20 |