Challenged claims of XR Communications LLC’s patent directed to multiple-input multiple-output wireless communications and beam forming antennas are unpatentable as obvious over prior art, the Patent Trial and Appeal Board said, in an inter partes review by Ericsson Inc. and Nokia of America Corporation. The board determined that the challenged claims are obvious over prior art that discloses a digital integrated antenna array for enhancing coverage and capacity of a wireless network, and that relates to a multiple antenna system that can operate in either MIMO mode, a beam forming/steering mode, or a diversity mode.
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