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| Patents for Mary R. Frost | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,008,181 | Nov. 07, 1911 | R. Milne | Change-speed mechanism | drill presses | |
| 1,017,441 | Feb. 13, 1912 | R. Milne | Gearing | drill presses | |
| 1,026,595 | May 14, 1912 | R. Milne | Feeding attachment for drill-spindles | drill presses | |