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3313211
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Information
Patent Grant
3313211
References
Source
Patent Number
3,313,211
Date Filed
Not available
Date Issued
Tuesday, April 11, 1967
58 years ago
CPC
E21D23/16 - Hydraulic or pneumatic features
E21D23/0052 - with advancing shifting devices connected therewith
E21D23/085 - acting on a conveyor or a guide for the mining machine
US Classifications
091 - Motors: expansible chamber type
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