Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11821156 | Track cleaner and grinder head attachment | Jerry Farmer, Wally Schultz, Yan Chen | 2023-11-21 |
| 4867095 | Differential pressure indicator | Bruce E. Shane, Keith D. Leady, Albert F. Cella | 1989-09-19 |
| 4311494 | Axial flow gas cleaning device | William G. Martin | 1982-01-19 |