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Patents for Hiram A. Gray
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
255,208Mar. 21, 1882J.H. TaylorGrinding Machinegrinding machines
275,029Apr. 03, 1883J.M. EvartsMachine for Bending Pipepipe bending machines
289,056Nov. 27, 1883R.C. Ellrich, G.S. AllenScrewdriverscrewdriver handles
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