Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6145468 | Silver indicator methods and test kit | — | 2000-11-14 |
| 5628943 | Method of making resin kernels and foam-like material containing reactive media | — | 1997-05-13 |
| 5084168 | System for removing substances from a solution | — | 1992-01-28 |
| 4988448 | Method for removing substances from a solution | — | 1991-01-29 |
| 4802961 | Silver removal apparatus and method | Charles W. Schmidt | 1989-02-07 |
| 4662613 | Reusable precious metal recovery cartridge | — | 1987-05-05 |
| 4497658 | Compact precious metal furnace and recovery method | — | 1985-02-05 |
| 4325732 | Precious metal recovery cartridge and method | — | 1982-04-20 |