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All Patents in class 261/8 | |||||
Number | Date | Patentee | Title | Type | |
245,776 | Aug. 16, 1881 | B. Brazelle | Feed-water heater and purifier | feedwater apparatus | |
981,188 | Jan. 10, 1911 | F.G. Hobart, W.W. Gore | Gas Cleaning Apparatus | gas cleaning apparatus |