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Patents Granted on 1921-05-31
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
RE15,115May 31, 1921E.D. MackintoshMethod of driving electric centrifugal machines
1,379,755May 31, 1921C.W. FrancisApparatus for making windingselectric motor making
1,379,994May 31, 1921J.J. KunzerMethod of Making Drills or the Likemaking drills and augers
1,379,995May 31, 1921J.J. KunzerMethod of Making Drills or the Likemaking drills and augers
1,380,139May 31, 1921W.A. GreavesTailstockwood lathes
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