Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6679984 | Method for recovery of gold and silver | Todd Weldon | 2004-01-20 |
| 6268590 | Apparatus and method for continuous retorting of mercury from ores and others mercury contaminated materials | Eldan L. Hill | 2001-07-31 |
| 6017428 | Electrowinning cell | Eldan L. Hill | 2000-01-25 |
| 5989486 | Apparatus for removal of the mercury from granulated materials | Charles H. Washburn | 1999-11-23 |
| 5891216 | Oven mercury retorting device | Charles H. Washburn | 1999-04-06 |
| 5551870 | Rotating kiln seal | — | 1996-09-03 |
| 5198078 | Procedure for electrolyte production of magnesium | Clarence R. Townsend | 1993-03-30 |
| 4343161 | Outboard motor lock | — | 1982-08-10 |