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| All Patents in class 417/420 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,438,629 | Mar. 30, 1948 | G.R. Anderson | Axial Air Gap Machine | electric motors | |
| 2,541,906 | Feb. 13, 1951 | G.R. Anderson | Seal for electric motors | electric motors | |