KeyCorp filed an action for declaratory judgment against Maxim Integrated Products [NCE], seeking declaration that its mobile applications do not infringe four patents related to secure information modules.  According to the complaint, KeyCorp received a letter and claim charts from Maxim demanding that KeyCorp either take a license to the portfolio or face litigation.  Maxim has filed ten prior suits since January 2012 against defendants including Expedia and Groupon.  Maxim has also been subject to five separate actions for declaratory judgment over the same period.  3/7, Northern District of Ohio, 1:2012cv00558.