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| View Original: | NMAH DC - IMG 8820.JPG (3264x2448) | |||
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| Keywords: NMAH DC - IMG 8820.JPG Electric motor 1837 patent model by Thomas Davenport US Exhibit in National Museum of American History Washington DC USA I took this photograph 2011-01-18 15 37 27 Daderot Public domain Electrical equipment in the National Museum of American History History of electric motors Patent models | ||||
