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| Patents Granted on 1843-07-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,179 | Jul. 20, 1843 | D. Newton | Machine for sawing clapboards | clapboard machines | |
| 3,181 | Jul. 20, 1843 | R. French | Single Lip Auger Bit & Means of Making | making drills and augers | |
| 3,184 | Jul. 20, 1843 | E. Pratt | Sawing and planing by combining a plane with a saw | reciprocating saws | |