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| All Patents in class 209/290 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,240X | Nov. 14, 1835 | E.P. Fitzpatrick | Revolving screen for cleaning grain | ||
| 694,565 | Mar. 04, 1902 | V.W. Mason, Jr. | Revolving Screen | separators | |