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| Patents for D. L. Humphrey | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 98,265 | Dec. 28, 1869 | J. Humphrey | Improvement in boring and mortising-machine | |
 | 116,932 | Jul. 11, 1871 | A. Crease | Woodworker's Vise | |
 | 122,320 | Jan. 02, 1872 | J. Huther | Improvement in saws | |
 | 1,021,498 | Mar. 26, 1912 | W.J. Zuill | Laundrying Machine | |