Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6926749 | Cyclone separator with compact inlet | — | 2005-08-09 |
| 6686752 | Wear indicator for refractory linings | William L. Heumann, Frank J. Elvin, Russell J. Lewis, Joseph A. Urban, Mark Noppenberger +1 more | 2004-02-03 |