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| Patents for O. M. Gottschall | |||||
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| Number | Date | Patentee | Title | Type | |
| 274,048 | Mar. 13, 1883 | E.R. Stilwell | Feed-water heater and purifier | feedwater apparatus | |
| 278,196 | May 22, 1883 | E.R. Stilwell | Feed-water heater | feedwater apparatus | |