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| Patents Granted on 1844-04-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,550 | Apr. 17, 1844 | R.M. Hoe | Inking-roller | printer | |
| 3,551 | Apr. 17, 1844 | R.M. Hoe | Printing-press | printer | |
| RE62 | Apr. 30, 1844 | J.C. Gillett | Improvement in machines for cutting shingles | shingle machines | |