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| Patents for Margaret E. Woolley | |||||
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| Number | Date | Patentee | Title | Type | |
| 714,811 | Dec. 02, 1902 | W.D. Litchfield | Brush-holder | motor brush holders | |
| 890,697 | Jun. 16, 1908 | J.E. Noeggerath | Protective device for unipolar machines | electric motors | |
| 1,034,357 | Jul. 30, 1912 | H. Geisenhoner | Hand Screw-Clamp | hand screws | |