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Patents for Richard Chapman
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
GB-186,502,931Nov. 14, 1865J. Tangye, R. Chapman, T.A. WestonImprovements in apparatus for raising, lowering, moving, or transporting heavy bodiesblock and tackles
160,471Mar. 02, 1875J.J. RobinsonImprovement in Stair-Builders' Rulesmeasuring rods
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