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| All Patents in class 416/178 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,331X | Jan. 13, 1829 | J. Houghton | Letting water on water wheels | water wheels | |
| 1,038,110 | Sep. 10, 1912 | B.S. Foss | Centrifugal fan-wheel | motor cooling | |
| 2,083,996 | Jun. 15, 1937 | T.G. Jonn | Centrifugal fan | vacuum cleaners | |