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
John Harvey Kellogg problems with James Caleb Jackson who already sold a wheat cereal under that name. In 1881, under threat of a lawsuit by Jackson, Kellogg changed the Sanitarium cereal's name to "Granola". It was used initially by patients at the Sanitarium, but slowly began to build up a following among former patients. In 1890, John formed the Sanitas Food Company to develop and market food products. The Kelloggs are best known for the invention of the famous breakfast cereal corn flakes. The development of the flaked cereal in 1894 has been variously described by those involved: Ella Eaton Kellogg, John Harvey