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lighbulb
Thomas Jefferson invents the lighbulb -
lighbulb
Invited to the white house to demonstrate it to President Ruthford B. Hayes. -
lightbulb
first public l demonstration of Thomas Edisons incadescent lighting system -
lightbulb
Thoma's Pearl pwerwing introduced 4 key elements of modern electric utility system. -
lightbulb
combined with different electrical companies -
lightbulb
Edison was dropped from the name and the company
