Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7377773 | Method of reducing NOx emissions in rotary preheater mineral kilns | Paul S. Nolan, Robert F. Kohl, Juergen Lauer | 2008-05-27 |
| 5230617 | Furnace shell cooling system | Ernst Klein | 1993-07-27 |