Today, the U.S. Court of Appeals for the Federal Circuit (CAFC) issued a ruling in Shamoon v. Resideo Technologies, Inc. affirming a final written decision by the Patent Trial and Appeal Board (PTAB) that invalidated patent claims covering a communication system for accessing geographically remote locations. While the decision was nonprecedential, the Federal Circuit also struck down constitutional challenges to the PTAB proceedings raised by the pro se inventor and patent owner.

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