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| All Patents in class 210/195.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,923,135 | Aug. 22, 1933 | H.L. Allen | Method of Cleaning and Cooling Gas Scrubbing Water and Apparatus Therefor | |
| 3,456,797 | Jul. 22, 1969 | M. Roger | Apparatus and method for cleaning dirty liquid | ||
| 3,531,403 | Sep. 29, 1970 | M.R. Estabrook | Method for decontaminating fluid | ||
| 3,540,588 | Nov. 17, 1970 | M.R. Estabrook | Method and Apparatus for Cleaning Liquid | ||