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| All Patents in class 310/178 | |||||
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| Number | Date | Patentee | Title | Type | |
| 238,631 | Mar. 08, 1881 | C.E. Ball | Dynamo or Magneto-Electric Machine | electric generators | |
| 351,902 | Nov. 02, 1886 | R. Eickemeyer | Magneto-electric and electro-magnetic machine | ||
| 406,968 | Jul. 16, 1889 | N. Tesla | Dynamo-electric machine | electric generators | |
| 618,578 | Jan. 31, 1899 | E.C. Newcomb | Alternating current motor | electric motors | |
| 890,697 | Jun. 16, 1908 | J.E. Noeggerath | Protective device for unipolar machines | electric motors | |