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Patents for John Sprogell
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
301,119Jul. 01, 1884J. Sprogell, H.S. HaskinsOverhead railwayhoists, winches, come-alongs
301,177Jul. 01, 1884J. Sprogell, H.S. HaskinsOverhead railwayhoists, winches, come-alongs
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