RPX Corporation, which acquires and licenses patent assets to clients to reduce their risk of patent litigation, filed on Monday with the SEC to raise up to $100 million in an initial public offering. The San Francisco, CA-based company, which was founded in 2008 and booked $95 million in sales last year, plans to list on the NASDAQ under the symbol RPXC. Goldman, Sachs & Co. and Barclays Capital are the lead underwriters on the deal. No pricing terms were disclosed.