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Sperry Sun Well Surveying Co

Sperry Sun
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2398800A Electrical prospecting method and apparatus Expired / Lapsed 1940-07-06 1946-04-23 0 Details
US2246460A Electrical prospecting apparatus Expired / Lapsed 1938-08-02 1941-06-17 0 Details