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Perfect Circle Corp

Perfect Ci
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2968707A Control means for oil well pumps Expired / Lapsed 1956-11-20 1961-01-17 0 Details
US2621416A Cylinder bore contour gauge Expired / Lapsed 1947-04-16 1952-12-16 0 Details