John Harvey Kellogg and in 1898 released the first batch of Sanitas Toasted Corn Flakes. A modified version with a longer shelf life was released in 1902. By that time, both "Granose Biscuits" and "Granose Flakes" were available. Will Kellogg continued to develop and market flaked cereal. When he proposed adding sugar to the flakes, John would not agree to the change. So, in 1906, Will started his own company, the Battle Creek Toasted Corn Flake Company. This marked the start of a decades-long feud between the brothers. Will's Battle Creek Toasted Corn Flake Company would eventually became the Kellogg Company, while John
Kellogg Switchboard & Supply Company Kellogg was born into a prominent and wealthy New England family. He attended prep school, and received two degrees in engineering from the University of Rochester. He married a member of one of Chicago's most prestigious families, and relocated to Illinois. In the 1880s, Kellogg was a manager at Western Electric as superintendent of its Chicago manufacturing and research plant, and also at the Southern Telephone and Telegraph Company. In 1897, with expiring, Kellogg set up a manufacturing firm, the Kellogg Switchboard & Supply Company. Kellogg himself held more than 150 patents, and had invented and the divided multiple telephone