The earliest documented telephone exchange in Northwestern Bell territory was opened by the Western Union Company in Keokuk, Iowa, on September 1, 1878. Using superior equipment designed by Thomas Edison and Elisha Gray, Western Union was in a competitive shoot-out with local licensee of the National Bell Telephone Company in Boston. On November 10, 1879, Western Union settled a Bell patent infringement suit by getting completely out of the phone business and selling all of its exchanges, including the Keokuk exchange, to the Bell Company.