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| Patents Granted on 1827-03-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,723X | Mar. 30, 1827 | M.J. Brunel | Obtaining power by certain fluids | ||
| 4,724X | Mar. 30, 1827 | P. Hawes | Manufacturing shingles | shingle machines | |
| 4,725X | Mar. 30, 1827 | J. Bailey | Horse hay rake | hay or straw rakes | |