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| All Patents in class 417/424.1 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,801,103 | Apr. 14, 1931 | E.S. Mummert | Sump-drain pump | ||
| 1,964,034 | Jun. 26, 1934 | R.V. Cook | Pumping System | pumps | |
| 6,315,530 | Nov. 13, 2001 | K.E. Wasch, D.J. Goodnick | Submerged Pump Having a Shaft Isolator | rotary pumps | |