Readers of the IAM blog will not be surprised by today’s news that RPX subsidiary RPX Clearinghouse is to purchase the 4,000 former Nortel patents owned by Rockstar, the NPE formed by Apple, BlackBerry, Ericsson, Microsoft and Sony after they – plus EMC – emerged as the successful bidders in the June 2011 auction of 6,000 of the former Canadian telecom giant’s IP assets. We revealed the defensive aggregator’s potential participation in Rockstar’s winding-up in November, as at least some of the shareholders became wary of being too closely associated with what many have lazily and erroneously described as a patent troll.

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