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| Patents Granted on 1849-02-27 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,140 | Feb. 27, 1849 | J. King | Machine for Dressing Nuts and Bolt-Heads | milling machines | |
| 6,146 | Feb. 27, 1849 | W. Wright | Metallic Packing for Pistons | ||