Challenged claims of Daingean Technologies Ltd.'s patent that relates to a terminal apparatus and a base station apparatus that can efficiently perform a random access procedure are unpatentable as obvious over prior art, the Patent Trial and Appeal Board said, in an inter partes review by AT&T Mobility LLC, AT&T Services Inc., Ericsson Inc., Nokia of America Corporation, and T-Mobile USA Inc. The board determined that the challenged claims are obvious over prior art that defines a two-step random access procedure in order to minimize latency of the related art four-step random access procedure, and a method and apparatus to ...