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Patents for Plumb, Burdict & Barnard | |||||
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Picture | Number | Date | Patentee | Title | |
GB-186,601,089 | Apr. 30, 1866 | O.C. Burdict | Improvements in manufacturing nuts and the preparation of the metal therefor, and in the machinery or apparatus employed therein | ||
![]() | 68,555 | Sep. 03, 1867 | O.C. Burdict | Improved machine for heading bolts | |
![]() | 97,351 | Nov. 30, 1869 | O.C. Burdict | Improved bolt-heading machine | |
![]() | 330,901 | Nov. 24, 1885 | H.J. Johnson | Machine for forging bolt-blanks |