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Patents Granted on 1928-05-08
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,669,006May 08, 1928H.L. JohnstonClutch mechanismindustrial machine clutches
1,669,134May 08, 1928N.T. KelsoMolded commutatorelectric motor making
1,669,319May 08, 1928R.M. BennethumWindmill
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