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| All Patents in class 403/23 | |||||
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| Number | Date | Patentee | Title | Type | |
| 274,795 | Mar. 27, 1883 | W.J. Liddell | Shaft-coupling | industrial machine shaft couplings | |
| 419,111 | Jan. 07, 1890 | F.M. Casey | Improvements in Insulated Nippers and Cutting-Instruments | pliers | |