Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US1996530A | Method of and apparatus for electrical investigation of rock drill holes | ELEK SK MALMLETNING AB | Expired / Lapsed | 1934-08-31 | 1935-04-02 | 1954-08-31 | 0.0 yrs | 0 | |
| US1748659A | Method and apparatus for magnetic prospecting | ELEK SK MALMLETNING AB | Expired / Lapsed | 1927-05-02 | 1930-02-25 | 1947-05-02 | 0.0 yrs | 0 |