Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4260401 | Regenerative cyclone-type air/particulate concentrator and collector | Andrew Truhan | 1981-04-07 |
| 4246013 | Cyclone type air/particulate concentrator and collector | Andrew Truhan | 1981-01-20 |