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| Patents for Dwight Slate Machine Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 347,969 | Aug. 24, 1886 | D. Slate | Drilling-machine | |
 | 390,604 | Oct. 02, 1888 | M.C. Johnson | Lathe-tool | |
| 521,206 | Jun. 12, 1894 | F.B. Covel | Centering Tool | ||
 | 667,880 | Feb. 12, 1901 | H.N. Hinckley, R. Anderson | Metal-working machine | |
 | 772,568 | Oct. 18, 1904 | H.N. Hinckley | Drill-press | |
 | 941,506 | Nov. 30, 1909 | C.B. Elmore | Change Speed Mechanism | |