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Patents for Benjamin W. Hoffman
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
162,101Apr. 13, 1875G.H. ReynoldsValve Gear for Steam Enginessteam engine valve gear
170,861Dec. 07, 1875W.R. LandfearImprovement in lathes for turning spoolsspool or bobbin machines
173,319Feb. 08, 1876R. McChesneyImprovement in scroll-sawing machinesscrollsaws
179,281Jun. 27, 1876H. DinningPliers for Securing Eyelet-Hooks in Leatherpliers
185,301Dec. 12, 1876A. Vivarttas, A. CrosbyPropelling and steering vesselsboats and ships
196,188Oct. 16, 1877W.E. BrockImprovement in Combined Bevel, Square, Compass, Calipers, &c.combination tools
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