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| All Patents in class 415/169.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 580,098 | Apr. 06, 1897 | H.D. Williams | Governor for Water Motors | ||
| 2,574,724 | Nov. 13, 1951 | M.H. Baker | Multistage Rotary Pump | ||