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| Patents for Darius Houghton | |||||
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| Number | Date | Patentee | Title | Type | |
| 272,139 | Feb. 13, 1883 | D. Houghton | Screw Cutting Tool | lathe tools | |
| 292,227 | Jan. 22, 1884 | D. Houghton | Lathe Center Grinding Machine | grinding attachments | |
| 335,818 | Feb. 09, 1886 | D. Houghton | Wire-Cutting Machine | wire gauging and cutting machines | |