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| All Patents in class 241/188.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| FX-9,292 | Dec. 15, 1835 | A.A. Wilder | Spiral bolt for bolting flour | miller | |
| 11,390 | Jul. 25, 1854 | I. Straub | Corncob-cutter | corn cutters | |
| 134,513 | Jan. 07, 1873 | L.S. Chichester | Machine for Preparing Flour | grain hullers | |