Microsoft files antitrust suit against InterDigital in patent feud

A Microsoft logo is seen at a pop-up site for the new Windows 10 operating system at Roosevelt Field in Garden City, New York July 29, 2015.

/Shannon Stapleton

InterDigital Inc has violated U.S. antitrust law by failing to keep its promise to fairly license its technology considered essential to mobile phone communications, Microsoft Corp said in a lawsuit on Thursday. The complaint against InterDigital, filed in federal court in Wilmington, Delaware, comes as the U.S. International Trade Commission is set to rule this month on whether Microsoft smartphones should be banned from import into the United States for infringing two of InterDigital's patents. (Reporting by Andrew Chung; Editing by James Dalgleish)