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| Patents for Alexander F. Roberts | |||||
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| Number | Date | Patentee | Title | Type | |
| 179,932 | Jul. 18, 1876 | A. Luckhaput | Improvement in machines for dressing staves | barrel making machines | |
| 180,672 | Aug. 01, 1876 | E.B. Stimpson | Improvement in apparatus for cutting and ornamenting shoe-uppers | leatherworker | |
| 193,985 | Aug. 07, 1877 | D.B. McRae | Improvement in circular saws | sawblades | |
| 200,733 | Feb. 26, 1878 | H.W. King | Improvement in machines for trussing barrels | barrel making machines | |