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| All Patents in class 407/19 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,339,656 | May 11, 1920 | F.J. Lapointe | Cutter-bar and bushing therefor | key seating machines | |
| 2,140,146 | Dec. 13, 1938 | H.E. Tautz | Broach | ||