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Patents Granted on 1931-09-22
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,824,700Sep. 22, 1931L.R. WilliamsonHydraulically operated reversing mechanismtapping machines
1,824,743Sep. 22, 1931K.B. NeuPiston Pin Toolautomotive tools
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