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| Patents for Mary H. Lewis | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,083,906 | Jan. 06, 1914 | L. Kassander | Lubricator | air compressor cylinder lubricators | |
| 1,114,123 | Oct. 20, 1914 | H. Dalton | Threadless nut or collar | metal lathes | |
| 1,208,397 | Dec. 12, 1916 | E.B. Stimpson | Shoe-shank | cobbler | |
| 1,265,050 | May 07, 1918 | H.E. Chayes | Grinding Machine | ||