On February 19, 2021, Unified Patents filed a Chinese invalidity challenge against CN104219523. The CN’523 patent is owned by the Electronics and Telecommunications Research Institute (ETRI). The CN‘523 patent is related to patents that are designated essential to the HEVC Advance patent pool as well as SISVEL’s AV1 and VP9 patent pools. It is also related to U.S. Patent 8,867,854, which Unified challenged in the recently instituted IPR2020-01048.

Unified is represented by Tao Chen at Wei Chixue Law Firm, and the case is managed by in-house counsel, Jessica L.A. Marks and Roshan Mansinghani.