Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8215358 | Steam corrugator system | John L. Donahue, D. Shawn Pearson | 2012-07-10 |
| 5827474 | Apparatus and method for measuring the depth of molten steel and slag | John Usher | 1998-10-27 |
| 5650117 | Slag detecting apparatus and method | Donald H. M. Kings, John Usher | 1997-07-22 |
| 5549280 | Probe system for reliably monitoring a condition in a metallurgical process | Donald H. M. Kings, John Usher | 1996-08-27 |