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Patents for James Duncan | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 141,264 | Jul. 29, 1873 | W.H. Arnold, J. Duncan | Improvement in hub-boring machines | |
![]() | 157,162 | Nov. 24, 1874 | W.H. Talbot, J. Duncan | Improvement in Bench Planes | |
![]() | 315,014 | Apr. 07, 1885 | J. Duncan | Bench plane |