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Patents for Robert W. Ross | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 423,090 | Mar. 11, 1890 | F.F. Smith | Combined Square, Plumb, and Level | |
![]() | 441,968 | Dec. 02, 1890 | P. Perry | Horseshoer's Nippers and Hoof Trimmer |