The team at Unified IP Services is using Pearl to identify and chart prior art against U.S. Patent 6,918,082, owned by Lone Star Document Management, LLC, an NPE and entity of Jeffrey M. Gross. The ‘082 patent is generally related to a system for reviewing, versioning, and commenting on electronic documents in portable document format (PDF) delivered over a network, such as the internet. The patent has been recently asserted against HCL America, Dropbox, Document Logistix, IBM, Atlassian, and Oracle.