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| All Patents in class 318/8 | |||||
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| Number | Date | Patentee | Title | Type | |
| 138,855 | May 13, 1873 | S.C. Carter | Electro-Magnetic Motors | electric motors | |
| 2,347,259 | Apr. 25, 1944 | W.L. Groene | Lathe Headstock Transmission | metalworking machine mechanisms | |