Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4351705 | Refining copper-bearing material contaminated with nickel, antimony and/or tin | Runyon G. Ernst, deceased, by Margaret Ernst, executrix, William R. Opie, Peter D. Parker | 1982-09-28 |