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| All Patents in class 210/329 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 8,288X | Jul. 08, 1834 | L. Ayres | Filtering apparatus | ||
| 3,630,359 | Dec. 28, 1971 | H.M. Harper, P. Pan | Multiple-Drum Interceptor | ||