The American Messenger Company focused primarily on package delivery to retail stores with special delivery mail delivered for its largest client the United States Postal Service. In 1913, the company acquired a Model T Ford as its first delivery vehicle. Casey and Ryan merged with a competitor, Evert McCabe, and formed Merchants Parcel Delivery. Consolidated delivery was also introduced, combining packages addressed to a certain neighborhood onto one delivery vehicle. In 1916, Charlie Soderstrom joined Merchants Parcel Delivery bringing in more vehicles for the growing delivery business. In 1919, the company expanded for the first time outside of Seattle to Oakland, California and changed its name to United Parcel Service. The name change to United Parcel Service was to remind the company expansion that operations were still United under the same organisation and Parcel identified the type of business offered as part of its Service. Common carrier service was acquired in 1922 from a company in Los Angeles, California. UPS became one of the only companies in the United States to offer common carrier service. At first common carrier was only limited to a small area around Los Angeles but by 1927 expanded to areas up to 125 miles outside the city. In 1924, a conveyor belt system was debuted for the handling of packages for UPS operations.