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| Patents Granted on 1829-07-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,577X | Jul. 20, 1829 | D. Jarves | Mode of Affixing Glass Chimneys to Various Kinds of Argand Lamps, to the Cork Tops Used With Glass Lamps | lamps | |
| 5,578X | Jul. 20, 1829 | C.E. Ruggles | Mode of Refining All Kinds of Oil | refining oil | |