Blizzplanet has uncovered that Blizzard has apparently filed a patent for something called "BattleChat," which purports to provide "an interface for the electronic transmission of messages and data including voice, text, and message transmission." Along with the recent news that Blizzard is seeking mobile developers, Blizzplanet supposed that this means Blizz is developing a mobile application for chatting with players either in World of Warcraft or Battle.net (their online network from previous games).

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