The Patent Trial and Appeal Board said that challenged claims of Estech Systems IP LLC’s patent that relates to voice over IP systems are unpatentable as obvious over prior art, in an inter partes review by RingCentral Inc. According to the board, the challenged claims are obvious over prior art that describes an integrated voice gateway system for use within a company that can route a voice telephone call between parties at two different locations over an IP network or over the Public Switched Telephone Network, a method and apparatus for accessing information in a distributed system and managing Lightweight ...
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