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| All Patents in class 210/167.31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,510,890 | May 12, 1970 | M.R. Estabrook | Drycleaning and fluid decontamination apparatus and method | ||
| 3,515,507 | Jun. 02, 1970 | M.R. Estabrook | Method and apparatus for decontaminating fluid with delayed filtering | ||
| 3,840,120 | Oct. 08, 1974 | D.K. Greenberg | Apparatus for separating particles from liquid | ||