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All Patents in class 476/21
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
529,713Nov. 27, 1894H.H. CummingsSpeed Changing and Reversing Mechanismmetalworking variable speed mechanisms
529,714Nov. 27, 1894H.H. CummingsSpeed Changing and Reversing Mechanismmetalworking variable speed mechanisms
529,715Nov. 27, 1894H.H. CummingsSpeed Changing, Reversing and Stopping Mechanism
620,439Feb. 28, 1899L.M. GautierMechanical Movementmetalworking variable speed mechanisms
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