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| All Patents in class 384/280 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,499,456 | Mar. 07, 1950 | A.A. Browne | Bearing Sleeve for Pump Shafts | centrifugal pumps | |
| 3,484,633 | Dec. 16, 1969 | F.L. Stecher | Rotor Shaft Bearing for Submersible Pumps | submersible pumps | |