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| All Patents in class 210/171 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,573,836 | Nov. 06, 1951 | G.B. Fox, D.B. Dickhart | Strainer for food handling apparatus | ||
| 4,950,392 | Aug. 21, 1990 | M.D. Tiegs, R.D. Liegel | Filtration tank for filtering waste water used in washing mechanical components | ||