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| All Patents in class 416/205 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,231,022 | Jan. 25, 1966 | J.W. Schroeter, D.N. Stewart | Axial fan construction | ||
| 3,545,884 | Dec. 08, 1970 | J.W. Schroeter, D.N. Stewart | Adjustable fan construction | ||