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Shift Ranking of April 28: The World's Largest Patent Holdings

April 28, 2014

1. Intellectual Ventures (estimated 30,000 patents) / 2. Interdigital (3571) / 3. Round Rock Research (3487) / 4. Wisconsin Alumni Research Foundation (2368) / 5. Rockstar Consortium (2362) / Source: PatentFreedom

https://p.dw.com/p/1BqAq
12.2012 DW Shift Ranking