In 2010, inventor Fred DuFresne formed two US intellectual property monetization firms—Cerinet USA Inc. and ipCapital Licensing Company—one or both of which has been doing business as Cerinet IP Licensing since January 2015. Over the past couple of years, multiple NPEs affiliated with DuFresne and/or Cerinet IP have launched litigation campaigns in disparate fields of technology, including three in just the past couple of weeks. On October 16, 2015, Cerinet IP formed Texas subsidiary Embedded Systems Products Intellectual Property, LLC (ESP IP), and on October 27, 2015, DuFresne/Cerinet IP appears to have formed Alert Signal Intellectual Property, LLC  (Alert Signal IP) and Catharon Products Intellectual Property, LLC (Catharon Products IP), both in Pennsylvania. ESP IP, Alert Signal IP, and Catharon Products IP have all filed litigations in the weeks since their formation, following a familiar pattern for DuFresne and Cerinet IP.

In the beginning of March, RPX saw 10 transfers of patents recorded with the USPTO.