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2904319
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Information
Patent Grant
2904319
References
Source
Patent Number
2,904,319
Date Filed
Not available
Date Issued
Tuesday, September 15, 1959
65 years ago
CPC
E21C27/124 - with rotatable cutters provided with breaking-down members
E21D17/003 - with essential hydraulic elements
E21D20/003 - Machines for drilling anchor holes and setting anchor bolts
US Classifications
299 - Mining or in situ disintegration of hard material
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