On May 23, 2013, Ricoh Americas Corporation filed IPR2013-00302 on U.S. Patent No. 7986426 on Distributed Computer Architecture and Process for Document Management; Oracle Corporation Clouding IP, LLC filed IPR2013-00304 on U.S. Patent No. 5944839 System and Method for Automatically Maintaining a Computer System; Gatekeeper Systems, Inc. filed IPR2013-00305 on U.S. Patent No. 7389836 Power-Assisted Cart Retriever with Attenuated Power Output 10947831; and Clearwire Corporation filed IPR2013-00306 on U.S. Patent No. 5590403 on Method and System for Efficiently Providing Two Way Communication between a Central Network and Mobile Unit.