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