Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6255983 | Degasser guide | Frank L. Kemeny, David J. Walker, Richard J. Zaranek, Frederick Mannion | 2001-07-03 |
| 6166681 | Measuring the thickness of materials | Roger Marquardt, David I. Walker, John G. Estocin, Frank L. Kemeny | 2000-12-26 |
| 6130637 | Measuring the thickness of hot slag in steelmaking | Roger Marquart, David J. Walker, John G. Estocin, Frank L. Kemeny | 2000-10-10 |