The company, which more than doubled in size between 2010 and 2011, said it would use the new funding for marketing and to meet its current and future demand.
Alleghany had previously completed a $5m funding round of the company in the third quarter of 2010.
AOP distributes requests for prior research to more than one million scientists and technologists using a global online human search engine, which is active in 188 countries.
It is also partner to 16 Fortune 100 companies and seven of the top ten US patent filers.
Weston Hicks, the firm’s CEO, said, “As seen from Apple’s acquisition of Nortel’s $4.5 bn patent portfolio and Google’s $12.5bn purchase of Motorola Mobility, patents are finally being acknowledged as an asset class.
“We believe that AOP’s innovative approach to patent research and its cutting-edge, proprietary technology, positions it for continued success.”
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