Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5939042 | Tellurium extraction from copper electrorefining slimes | Jack S. Stafiej, Carl W. White | 1999-08-17 |
| 5620586 | Silver electrolysis method in Moebius cells | John L. Cromwell | 1997-04-15 |
| 5271909 | Method of tellurium separation from copper electrorefining slime | Carl W. White | 1993-12-21 |
| 5100528 | Continuous silver refining cell | Bernard H. Morrison, John L. Cromwell, Paul Spira | 1992-03-31 |