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| Patents for Frank E. Hoadley | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 251,524 | Dec. 27, 1881 | E.V. Clemens | Bevel Square | |
 | 628,752 | Jul. 11, 1899 | H.M. Brown | Double tool-holder for machine-tools | |