Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4319971 | Method and means for recovering silver by electrolysis | David Good | 1982-03-16 |
| 4317707 | Portable electrolysis unit for recovery of silver from photographic film | David Good | 1982-03-02 |