NEWPORT BEACH, Calif.--(BUSINESS WIRE)--Acacia Research Corporation (NASDAQ: ACTG) announced today that its Unified Messaging Solutions LLC subsidiary has entered into a settlement and patent license agreement with Castle Street Investments plc (fka Cupid plc). The agreement resolves litigation that was pending in the United States District Court for the Eastern District of Texas and the United States District Court for the Northern District of Illinois. ABOUT ACACIA RESEARCH CORPORATION Founde