13 h 17 m, 21 jun 1885 año - Westinghouse invents transformer for alternating current
Descripción:
George Westinghouse had over 400 patents to his name | transformer for producing high voltage alternating current | made possible the lighting of cities and operation fo electric streetcars, subways, and electrically powered machinery / appliances
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fecha:
13 h 17 m, 21 jun 1885 año
Ahora mismo
~ 140 years ago