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Patents for J. P. Hall
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
45,535Dec. 20, 1864H. TaylorParallel Rule with Protractorrules
48,857Jul. 18, 1865G. Westinghouse, Sr.Improvement in sawing machinesdrag saws
49,139Aug. 01, 1865H.H. Abbe, W.H. NicholsImproved Lathe for Turning Heads of Nail, Tacks, etc.metal lathes
50,759Oct. 31, 1865G. Westinghouse, Jr.Improvement in rotary steam-engines
51,522Dec. 12, 1865C.A. StillmanImprovement in pumpssteam pumps
146,123Jan. 06, 1874G.W. Chandler, J.G. FolsomBit-stockbrace chucks
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