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| All Patents in class 403/112 | |||||
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| Number | Date | Patentee | Title | Type | |
| 863,214 | Aug. 13, 1907 | W.F. Phelps | Supporting-base for electric fans | fans | |
| 1,515,055 | Nov. 11, 1924 | R. Katolin | Folding Rule | ||