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| Patents for Ellen K. O'Keefe | |||||
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| Number | Date | Patentee | Title | Type | |
| 916,344 | Mar. 23, 1909 | C.E. Martin | Core-Box Plane | core box planes | |
| 1,038,967 | Sep. 17, 1912 | W. Russell | Tap-wrench | tap and die holders | |
| 1,130,542 | Mar. 02, 1915 | W. Russell | Screw-cutting die | taps and dies | |