Challenged claims of Entropic Communications LLC’s patent that discloses a method and apparatus for spectrum monitoring are unpatentable as obvious over prior art, the Patent Trial and Appeal Board said, in an inter partes review by Comcast Cable Communications LLC. The board determined that the challenged claims are obvious over various combinations of prior art, including prior art that discloses a set-topbox that monitors signal quality in downstream and upstream paths and sends related information to a headend, that television receivers of the time had a single tuner for a single channel but recognizes that the evolving market for data ...
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