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