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| All Patents in class 209/44 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 5,562X | Jul. 08, 1829 | R. Lee | Machine for Washing, Cleaning, and Separating Gold Dust, &c. | ||
| 6,516X | Apr. 23, 1831 | G.B. Palmer | Machine for separating gold ore from earth | ||
| 6,871X | Dec. 21, 1831 | O. Willis | Gold, washing machine, called the railway car gold riddle | ||
| 7,222X | Sep. 05, 1832 | O. Willis | Gold, swinging, riddle, being an improvement on the railway car, for gold riddle, previously patented by him | ||