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2066175
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Information
Patent Grant
2066175
References
Source
Patent Number
2,066,175
Date Filed
Not available
Date Issued
Tuesday, December 29, 1936
87 years ago
CPC
E21C37/08 - Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole
US Classifications
299 - Mining or in situ disintegration of hard material
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