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All Patents in class 222/578
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
76,409Apr. 07, 1868S. DarlingImprovement in inkstandsdraftsman
366,206Jul. 12, 1887S. DarlingInkstanddraftsman
369,101Aug. 30, 1887S. DarlingInkstanddraftsman
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