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Patents for R. Burkhardt
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,178,007Apr. 04, 1916A. GloorWrenchpipe and nut combination wrenches
1,249,300Dec. 11, 1917W.A. BarkerChuckmetal lathe chucks
1,391,039Sep. 20, 1921C.H. BeachElectric Grinder
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