| All Patents in class 209/44 |
Patents 1 -
4
of 4
      |
| Number | Date | Patentee | Title | Type |
| 5,562X | Jul. 08, 1829 | R. Lee | Machine for Washing, Cleaning, and Separating Gold Dust, &c. | ore processing apparatus |
| 6,516X | Apr. 23, 1831 | G.B. Palmer | Machine for separating gold ore from earth | ore processing apparatus |
| 6,871X | Dec. 21, 1831 | O. Willis | Gold, washing machine, called the railway car gold riddle | ore processing apparatus |
| 7,222X | Sep. 05, 1832 | O. Willis | Gold, swinging, riddle, being an improvement on the railway car, for gold riddle, previously patented by him | ore processing apparatus |
