Early in January we noted that a non-practicing entity named Steelhead Licensing had filed a number of complaints for patent infringement against various wireless device manufacturers and cellular carriers.  Of particular note in those suits was that the patent at issue in all of the actions — U.S. Pat. No. 5,491,834, entitled “Mobile Radio Handover Initiation Determination” — was previously owned by British Telecom, is due to expire next month, and (according to Steelhead, apparently) is essential to various 3G and 4G wireless communications standards.  On Friday, January 11, Steelhead expanded its assertion activities relating to the ‘834 patent, filing infringement actions against Acer, Amazon.com, Asustek, and Dell.
Continue Reading Steelhead Licensing expands cellular-essential patent assertion activities