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  1835 Joseph Henry invented the electrical relay, used to send electrical currents long distances.
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  1837 Thomas Davenport invented the electric motor, an invention that is used in most electrical appliances today
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  1844 Samuel Morse invented the electric telegraph, a machine that could send messages long distances across wire
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  1886 William Stanley developed the induction coil transformer and an alternating current electric system.
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  1896 An AC powerline that transmits power 20 miles from Niagra Falls to Buffalo, New York was opened.
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  1900 Highest voltage transmission line 60 Kilovolt.
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  1935 Public Utility Holding Company Act.
Federal Power Act. - 
  
  1947 Transistor invented by scientists at Bell Telephone Laboratiories.
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  1957 Shippingport Reactor in Pennsylvania was the first nuclear power plant to provide electricity to customers in the U.S.