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Patents for Plumb, Burdict & Barnard
Patents 1 - 4 of 4
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PictureNumberDatePatenteeTitle
  GB-186,601,089Apr. 30, 1866O.C. BurdictImprovements in manufacturing nuts and the preparation of the metal therefor, and in the machinery or apparatus employed therein
68,555Sep. 03, 1867O.C. BurdictImproved machine for heading bolts
97,351Nov. 30, 1869O.C. BurdictImproved bolt-heading machine
330,901Nov. 24, 1885H.J. JohnsonMachine for forging bolt-blanks
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