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| All Patents in class 210/123 | |||||
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| Number | Date | Patentee | Title | Type | |
| 855,932 | Jun. 04, 1907 | W.E. Bryant | Float Valve for Drain Cock Plugs | lubricators | |
| 1,923,135 | Aug. 22, 1933 | H.L. Allen | Method of Cleaning and Cooling Gas Scrubbing Water and Apparatus Therefor | oil gas apparatus | |