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| All Patents in class 417/350 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,906,533 | May 02, 1933 | J. Burke | Air circulating device | heaters | |
| 3,022,739 | Feb. 27, 1962 | R.H. Prescott, G.H. Herrick | Motor and Pump Apparatus | submersible pumps | |