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| All Patents in class 185/40E | |||||
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| Number | Date | Patentee | Title | Type | |
| 39,827 | Sep. 08, 1863 | J.D. Parrot | Churn Power | churns | |
| 77,462 | May 05, 1868 | A.B. Corby | Improvement in churns | churns | |