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Patents Granted on 1923-12-11
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,477,052Dec. 11, 1923J.D. GibbsFriction gearingdrill presses
1,477,337Dec. 11, 1923G.O. Leopold, T.J. FegleySpiral toolspiral screwdrivers
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