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Patents for Plumb, Burdict & Barnard
Patents 1 - 4 of 4
First set of recordsLast set of records
GB-186,601,089Apr. 30, 1864O.C. BurdictImprovements in manufacturing nuts and the preparation of the metal therefor, and in the machinery or apparatus employed thereinnut or bolt making machines
68,555Sep. 03, 1867O.C. BurdictImproved machine for heading boltsnut or bolt making machines
97,351Nov. 30, 1869O.C. BurdictImproved bolt-heading machinenut or bolt making machines
330,901Nov. 24, 1885H.J. JohnsonMachine for forging bolt-blanksnut or bolt making machines
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