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Patents for John Knowlson Jr.
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
150,765May 12, 1874J. Knowlson, Jr.Improvement in rope-drums for windlasseshoists, winches, come-alongs
RE9,806Jul. 19, 1881J. Knowlson, Jr.Rope-drum for windlasseshoists, winches, come-alongs
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