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All Patents in class 33/32.5 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 17,606 | Jun. 16, 1857 | S.C. Hubbard | Joint-Rule Graduating Machine | |
![]() | 432,328 | Jul. 15, 1890 | J.A. Painter | Center and Mortise-Gage |