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| Patents Granted on 1844-12-31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,872 | Dec. 31, 1844 | R.S. Hannaford, R.H. Penny, W.F. Converse | Machinery for Cutting Screws in the Posts and On the Rails of Bedsteads | wood threading machines | |