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| Patents for Perrin G. March | |||||
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| Number | Date | Patentee | Title | Type | |
| 309,073 | Dec. 09, 1884 | P.G. March | Drilling-machine | drill presses | |
| 807,123 | Dec. 12, 1905 | P.G. March | Shaping-machine | metal shapers | |