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| All Patents in class 209/288 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,673X | Jul. 28, 1831 | J. Bolton | Bolt for separating clover chaff from straw | threshers and thrashers | |
| 1,950,501 | Mar. 13, 1934 | J.J. MacKay | Rock crushing plant | ore processing apparatus | |