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| Patents for James F. McElroy | |||||
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| Picture | Number | Date | Patentee | Title | |
| 519,338 | May 08, 1894 | J.F. McElroy | Electric Switch | ||
| 578,759 | Mar. 16, 1897 | J.F. McElroy | Rotary Engine | ||
 | 845,672 | Feb. 26, 1907 | J.A. Thompson | Nail-extractor | |