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1978366
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Patent Grant
1978366
References
Source
Patent Number
1,978,366
Date Filed
Not available
Date Issued
Tuesday, October 23, 1934
89 years ago
CPC
E21C25/22 - Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
US Classifications
299 - Mining or in situ disintegration of hard material
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