Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5228902 | Method of desulfurization in vacuum processing of steel | Brad Hjerpe, Roger Marquart, James D. Reisinger | 1993-07-20 |
| 5106412 | Method for providing steel with lowered hydrogen level after ladle treatment | Keith E. Sessions, William J. Stolnacker, deceased | 1992-04-21 |