Charles T. Manley perfects the first electric popcorn machine :

1925

Source: Ottawa Citizen, 2/26/2005

 
   
 
Photo: Monica Nguyen (July 30, 2006 flickr)
Quarts of popcorn consumed annually by Americans :

17 billion
Or about 54 quarts a person, according to the Popcorn Board.
Source: The Popcorn Board, 7/11/2007
Website: www.popcorn.org

 
   
  Charles Cretors of Chicago invents the popcorn popper:

1885
The popcorn popper was invented in 1885 by Charles Cretors.
Source: Christian Science Monitor, 10/24/1983

 
   
  First popcorn designed for home preparation:

1914
In 1914, the American Pop Corn Company of Sioux City, Iowa introduced Jolly Time popcorn. In 1925, they added the slogan "Guaranteed to Pop."
Source: JollyTime.com, 7/11/2007