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1841268
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Patent Grant
1841268
References
Source
Patent Number
1,841,268
Date Filed
Not available
Date Issued
Tuesday, January 12, 1932
92 years ago
CPC
E21C25/40 - having links with integrally formed picks
US Classifications
299 - Mining or in situ disintegration of hard material
076 - Metal tools and implements, making
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