Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7854397 | Long throw shotcrete nozzle | Dominick M. Colavito, Ronald W. Schmidt, Richard Griffin, Cleve Ruston | 2010-12-21 |
| 7078360 | High durability refractory composition | Joseph Schmidt | 2006-07-18 |
| 6915966 | Apparatus for the gunning of a refractory material and nozzles for same | Erwin Anton Letzgus, Jr., Harold Harrison Gordon, William J. Peschler, John Anton Parkinson | 2005-07-12 |