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| All Patents in class 55/464 | |||||
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| Number | Date | Patentee | Title | Type | |
| 512,681 | Jan. 16, 1894 | N. Clute | Oil Extractor | separators | |
| 711,446 | Oct. 14, 1902 | E.M. Thacker | Apparatus for Separating Oil | separators | |