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Patents for H. H. Doubleday
Patents 1 - 6 of 6
First set of recordsLast set of records
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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