 Along with "State Street Bank v. Signature Financial Group", this case was the most referred case on business method patent with a "useful, concrete and tangible result" test by U.S. courts until "Bilski v. Kappos" authoritatively overruled it.AT&T Corp., originally the , is an American telecommunications company that provides voice, video, data, and Internet telecommunications and professional services to businesses, consumers, and government agencies.This company is a subsidiary of AT&T Inc. and its subsidiary AT&T Communications still provides long-distance service across the United States.