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| Patents for Nathaniel S. Keith | |||||
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| Number | Date | Patentee | Title | Type | |
| 228,763 | Jun. 15, 1880 | N.S. Keith | Dynamo-Electrical Machine | electric motors | |
| 255,795 | Apr. 04, 1882 | N.S. Keith | Electric Light Regulator | electric arc lamps | |
| 257,588 | May 09, 1882 | N.S. Keith | Electric Light Regulator | electric arc lamps | |