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| All Patents in class 29/5 | |||||
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| Number | Date | Patentee | Title | Type | |
| 124,123 | Feb. 27, 1872 | W.C. Eiseman | Improvement in Machines for Bending Metal | sheet metal | |
| 185,441 | Dec. 19, 1876 | W. Gibb | Machine for Forming Split Keys | metal twisting machines | |
| 551,887 | Dec. 24, 1895 | F.P. Cady | Machine for Making Split Keys | metalworking presses | |