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ELEK SK MALMLETNING AB

ELEK SK MA
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US1996530A Method of and apparatus for electrical investigation of roc… Expired / Lapsed 1934-08-31 1935-04-02 0 Details
US1748659A Method and apparatus for magnetic prospecting Expired / Lapsed 1927-05-02 1930-02-25 0 Details