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| All Patents in class 55/329 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,368,343 | Jan. 30, 1945 | E.E. Buskirk | Air purifier | dust collectors | |
| 2,384,414 | Sep. 04, 1945 | C.H. Antrim | Dust collector for grinding and other machines | ||
| 2,430,448 | Nov. 11, 1947 | R. Breckheimer | Dust collector | waste collection mechanisms | |