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Patents for Edward B. Sperry
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
196,188Oct. 16, 1877W.E. BrockImprovement in Combined Bevel, Square, Compass, Calipers, &c.combination tools
197,171Nov. 13, 1877P. PryibilImprovement in shaft-hangersindustrial machine shaft hangers
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