On March 28, 2017, the Patent Trial and Appeal Board (PTAB) instituted an IPR petitioned by Unified on a patent owned and asserted by Intellectual Ventures I, LLC.  The Board instituted trial on multiple grounds against U.S. Patent 6,775,745 (discloses a "hybrid data caching mechanism" originally assigned to Roxio Inc.).  

The '745 Patent has been asserted in district court litigation against EMC, Lenovo, and NetApp.  

To read the petition and view the entire case proceeding, please see Unified's PTAB Portal.