"International Business Machines Corp filed a lawsuit on Wednesday against daily deals website operator Groupon Inc alleging infringement of its patents. The complaint, filed at the U.S. District Court for the District of Delaware, accuses Groupon of building its business model using IBM's patents without authorization despite prior warnings."
Thursday, March 3, 2016
IBM Sues Groupon Over Alleged Patent Infringement; Reuters via New York Times, 3/2/16
Reuters via New York Times; IBM Sues Groupon Over Alleged Patent Infringement: