Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8800844 | Reinforcement of friction plug welds | John M. Comfort, John Vollmer, Mark A. Fischer | 2014-08-12 |
| 8540134 | Reinforcement of friction plug welds | John M. Comfort, John Vollmer, Mark A. Fischer | 2013-09-24 |