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| All Patents in class 210/460 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,512,877 | Jun. 27, 1950 | F.F. Rike | Truck tank emergency valve | heavy vehicles | |
| 4,950,392 | Aug. 21, 1990 | R.D. Liegel, M.D. Tiegs | Filtration tank for filtering waste water used in washing mechanical components | ||