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3307875
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Patent Grant
3307875
References
Source
Patent Number
3,307,875
Date Filed
Not available
Date Issued
Tuesday, March 7, 1967
57 years ago
CPC
E21C25/34 - Chains
E21C35/18 - Mining picks Holders therefor
US Classifications
299 - Mining or in situ disintegration of hard material
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