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Patents for Helen Graham
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
432,328Jul. 15, 1890J.A. PainterCenter and Mortise-Gagecenter marking gauges
475,767May 31, 1892H.W. HillHog Ring Pinchershog ring
510,994Dec. 19, 1893T. SchaferExtensible Measuring Stickspecial purpose gauges
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