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Patents for James Duncan
Patents 1 - 3 of 3
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PictureNumberDatePatenteeTitle
141,264Jul. 29, 1873W.H. Arnold, J. DuncanImprovement in hub-boring machines
157,162Nov. 24, 1874W.H. Talbot, J. DuncanImprovement in Bench Planes
315,014Apr. 07, 1885J. DuncanBench plane
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