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| All Patents in class 241/261.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 198X | Jan. 08, 1798 | T. Bruff, Sr. | Coffee Grinding | coffee mills | |
| 692,243 | Feb. 04, 1902 | W.E. Copenhaver | Mill | grinding mills | |