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Patents for William Douglas
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
9,043XAug. 20, 1835W. DouglasDouble forcing pumpspumps
188,298Mar. 13, 1877R. JonesCoach-Wrenchquick adjust wrenches
1,422,345Jul. 11, 1922W. DouglasEllipse Drawing Tooltrammels
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