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| All Patents in class 209/37 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 39,093 | Jun. 30, 1863 | J. Fergusson, C.S. Burt | Grain separator | |
| 790,417 | May 23, 1905 | D.L. Adelsperger | Pneumatic Separator | ||