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Patents for W. H. Allen
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
159,999Feb. 23, 1875G.F. BellowsImprovement in saw-millssawmill carriages
257,530May 09, 1882B.F. SturtevantSteam Slide Valvesteam engine valves
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