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| Patents for Fredrick Curtis | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 93,026 | Jul. 27, 1869 | A.E. Whitmore | Sliding Calipers | |
![]() | 101,689 | Apr. 05, 1870 | A.E. Whitmore | Sliding Calipers | |
![]() | 105,153 | Jul. 05, 1870 | A.E. Whitmore | Calipers | |