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| Patents for Wales Aldrich | |||||
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| Number | Date | Patentee | Title | Type | |
| 160,189 | Feb. 23, 1875 | J.W. Hill | Improvement in frames for portable steam-engines | steam engines | |
| 169,328 | Nov. 02, 1875 | W. Aldrich | Improvement in horse hay-rakes | hay or straw rakes | |
| 195,692 | Oct. 02, 1877 | W. Aldrich | Hand-Drills | drill presses | |