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| All Patents in class 454/338 | |||||
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| Number | Date | Patentee | Title | Type | |
| 587,373 | Aug. 03, 1897 | H.L. Parker, C.R. Meston | Window-blower | ||
| 1,614,190 | Jan. 11, 1927 | O.K. Dyer | Fan bracket or support | ||
| 1,750,458 | Mar. 11, 1930 | J. Burke | Ventilating system | blowers | |