sentences:  In 1891 he acquired a patent and then in 1895 he launched the Cornflakes brand, which overnight captured a national market.Soon there were forty rival manufacturers in the Battle Creek area.His brother William K. Kellogg (1860–1951) worked for him for many years until, in 1906, he broke away, bought the rights to Cornflakes, and set up the Kellogg Toasted Corn Flake Company.