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Patents for H. H. Doubleday
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
88,535Apr. 06, 1869A.P. BarlowReciprocating mechanism for sawmillsawmills
107,255Sep. 13, 1870H.J. HarrisImprovement in Multiple Toolcombination tools
114,085Apr. 25, 1871S.A. Drake, I. AlmyImprovement in Plane-Ironsplane blades
128,417Jun. 25, 1872R. NicholImprovement in Combined Rules and Dividersdividers
198,825Jan. 01, 1878C.W. ThompsonImprovement in barrel-hoop machineshoop making machines
205,923Jul. 09, 1878C.W. ThompsonImprovement in machines for making barrelsbarrel making machines
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