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All Patents in class 408/219
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
93,824Aug. 17, 1869W. HumphreysImproved Compound Tool for Water and Gas Pipespipe reamers
117,082Jul. 18, 1871J.J. KrausImprovement in wood-boring toolstapered reamers
224,921Feb. 24, 1880W. KenworthyTaptaps and dies
832,380Oct. 02, 1906J. HartnessTap and Process of Making the Sametaps and dies
992,946May 23, 1911D.W. EdwardsWood-Tapwood threading machines
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