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| All Patents in class 55/445 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 408,907 | Aug. 13, 1889 | E.F. Woodbury, J.A. Woodbury | Dust-Collector | ||
 | 2,430,448 | Nov. 11, 1947 | R. Breckheimer | Dust collector | |