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| All Patents in class 422/232 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,463,526 | Jul. 31, 1923 | C.H. Fulson | Mechanical cooker | seed or nut oil apparatus | |
| 2,416,717 | Mar. 04, 1947 | M.C. Shaw | Mechanical Activation | mixing machines | |