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1033990
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Information
Patent Grant
1033990
References
Source
Patent Number
1,033,990
Date Filed
Not available
Date Issued
Tuesday, July 30, 1912
112 years ago
CPC
E21B19/083 - Cam, rack or like feed mechanisms
Y10T74/1616 - Cyclical displacement responsive to the alternating-motion
US Classifications
074 - Machine element or mechanism
166 - Wells
173 - Tool driving or impacting
175 - Boring or penetrating the earth
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