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| All Patents in class 29/889.4 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,038,110 | Sep. 10, 1912 | B.S. Foss | Centrifugal fan-wheel | |
| 1,996,155 | Apr. 02, 1935 | J.T. Janette | Rotor construction for fans or the like | ||
 | 2,480,807 | Aug. 30, 1949 | C.B. De Vlieg | Method and apparatus for making impeller wheels | |
| 3,294,315 | Dec. 27, 1966 | D.N. Stewart, R. Olson | Fan construction | ||