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Patents for J. Plankinton | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 169,927 | Nov. 16, 1875 | H.S. Tarr | Improvement in plumb-levels | |
![]() | 174,609 | Mar. 07, 1876 | R. Wright | Improvement in Machines for Bending Tubing |