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| Patents for Francis M. Frost | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 983,745 | Feb. 07, 1911 | R. Milne | Locking device for shiftable members | |
 | 983,746 | Feb. 07, 1911 | R. Milne | Feed mechanism for drill-spindles | |