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| All Patents in class 416/120 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,340X | Dec. 28, 1832 | H. Crenshaw | Water power multiplied by applying water to a number of wheels in succession | water wheels | |
| 336,618 | Feb. 23, 1886 | A. Barbendreier | Tritulator | material grinding machines | |