August 31, 2010
Acacia Research Corp. unit DNT LLC has lost its bid for a new trial or to overturn a jury verdict that found Verizon Wireless Inc., T-Mobile USA Inc. and others did not infringe a dialing technology patent.
December 15, 2009
A federal jury has come down in favor of Verizon Wireless Inc., T-Mobile USA Inc. and others in a suit brought by Acacia Research Corp. unit DNT LLC, finding that the cell phone service providers did not infringe a dialing technology patent.
January 14, 2009
A clutch of major cell phone companies — including Sprint Nextel Corp., Verizon Wireless Inc. and T-Mobile USA Inc. — have been hit with a lawsuit alleging their wireless modem cards infringe a patent held by DNT LLC, a subsidiary of Acacia Research Corp.