On Friday, January 4, 2013, a non-practicing entity named Steelhead Licensing LLC filed a litany of SEP-related lawsuits in the United States District Court for the District of Delaware against various wireless device manufacturers and cellular carriers.  Each of the entities is accused of infringing a single, soon-to-expire (on Feb. 13) patent — U.S. Pat. No. 5,491,834, entitled “Mobile Radio Handover Initiation Determination.”
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