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All Patents in class 409/284 | |||||
Number | Date | Patentee | Title | Type | |
275,393 | Apr. 10, 1883 | L.J. Knowles | Machine for Forming Key-Seats in Hubs of Gears, &c. | metalworking machines | |
1,434,711 | Nov. 07, 1922 | F.J. Lapointe | Manually-operated broaching machine | broaching machines |