Postcard showing an aerial view of the Kellogg Company factory in Battle Creek, with cartoon characters in a drawn balloon floating over the plant. Caption on front: Kellogg's of Battle Cree "We've just seen 'em make the World's Greatest Flakes!" Caption on back: Kellogg Company Battle Creek, Michigan The home of Kellogg's as it looks today. Since 1906, Kellogg's has been producing America's best-liked cereals. The world's largest manufacturer of ready-to-eat cereals, Kellogg's has plants in the U.S. and throughout the world. Kellogg's the greatest name in cereals.