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All Patents in class 74/89 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 81,450 | Aug. 25, 1868 | A. Wirsching | Improvement in watchmaker drills | |
![]() | 113,344 | Apr. 04, 1871 | W.H. Rand | Drill-stock | |
![]() | 230,746 | Aug. 03, 1880 | G.B. Clark | Hand-Drill |