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| All Patents of Type: grain sifters | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,471X | Apr. 29, 1829 | J. Nichols | Machine for Sifting | grain sifters | |
| 335,902 | Feb. 09, 1886 | C.D. Edwards | Cockle-separating machine | grain sifters | |