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| Patents Granted on 1848-03-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,478 | Mar. 21, 1848 | R.D. Granger | Cooking Stove | stoves | |
| 5,479 | Mar. 21, 1848 | A.H. Hart | Tuyere | forge tuyeres | |
| 5,481 | Mar. 21, 1848 | C.W. Case | Apparatus for Turning | wood lathes | |
| 5,482 | Mar. 21, 1848 | S. Porter | Washing Machine | washing machines | |