Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6381829 | Method for making an improved main shaft for a coal pulverizer by employing a ceramic coating thereon | Robert R. Piepho | 2002-05-07 |
| 6270026 | Strain relief main shaft assembly | Robert R. Piepho | 2001-08-07 |
| 6132135 | Strain relief main shaft assembly | Robert R. Piepho | 2000-10-17 |
| 6055913 | Coal spreader with swirl vanes | Bryan Hand | 2000-05-02 |
| 4705098 | Labyrinth articulation joint for regenerative air heater seal frame | Frederick M. Untch | 1987-11-10 |
| 4659114 | Rotating pipe joint having a floating seal | — | 1987-04-21 |
| 4561680 | Swivel joint assembly | — | 1985-12-31 |