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BBC News: Google has purchased 187 more patents and 36 patent applications from IBM. Some of the key patents included in the deal cover "using semantic networks to develop a social network," "identifying common interests between users of a communication network," a method for using web-based applications across additional devices and a "computer phone." Last summer, Google purchased about 1,000 other patents from IBM.
Google is embroiled in a number of patent lawsuits, and observers say that these new patents will help the company fight those battles.