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| Patents Granted on 1828-08-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,197X | Aug. 21, 1828 | W.M. Johnson | Casting printers' types | printer | |
| 5,198X | Aug. 21, 1828 | L.M. Richards | Boiler or steam generator | stationary boilers | |