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| Patents for David M. Mefford | |||||
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| Number | Date | Patentee | Title | Type | |
| 18,922 | Dec. 22, 1857 | D.M. Mefford | Corn Husker | corn huskers | |
| 28,884 | Jun. 26, 1860 | D.M. Mefford | Corn Husker | corn huskers | |
| 159,597 | Feb. 09, 1875 | D.M. Mefford | Improvement in Weather-Board Gages | clapboard markers | |