The Incredible Inventions of Thomas Edison By heyland Period: Apr 11, 1868 to Apr 11, 2014 Invention of the Vote Recorder Period: Apr 11, 1869 to Apr 11, 2014 Invention of the Printing Telegraph Period: Apr 11, 1872 to Apr 11, 2014 Invention of the Automatic Telegraph Period: Apr 11, 1878 to Apr 11, 2014 Founding of the Edison Electric Light Company Period: Apr 11, 1879 to Apr 11, 2014 The Invention of the Incandescent Electric Lamp