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| Patents for Frank A. Humphrey | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 257,870 | May 16, 1882 | F.A. Humphrey | Spokeshave | |
 | 348,674 | Sep. 07, 1886 | F.A. Humphrey | Combined Panel-Gage, Measuring-Rod, And Trammel | |
 | 349,102 | Sep. 14, 1886 | F.A. Humphrey | Marking-Gage | |