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Patents for John H. Clark
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
RE200May 13, 1851G.H. CorlissImprovements in Cut-Off and Working the Valves of Steam Engines steam engines
347,469Aug. 17, 1886J.H. ClarkGas Enginegas and gasoline engines
353,402Nov. 30, 1886J.H. ClarkReversible Gas Enginegas and gasoline engines
573,651Dec. 22, 1896L.L. HallWenchquick adjust wrenches
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