Dolby VVC patent revocation confirmed by EPO appeal

On July 7, 2025, the EPO Board of Appeals confirmed the decision to revoke all claims of EP 3675491, owned by Dolby International AB. EP ‘491 generally relates to video coding techniques that use data hiding to decrease bandwidth. The patent is related to patents that are designated essential to the Access Advance patent pool and has also been identified as potentially essential to the Versatile Video Coding (VVC) standard.

Unified was represented by Dr. Andrew McGettrick and Dr. Susan Keston at HGF Law, and by in-house counsel, Jessica L.A. Marks and Roshan Mansinghani.

IdeaHub video codec patent challenged

On January 31, 2025, Unified Patents filed an ex parte reexamination proceeding against U.S. Patent 10,904,539, owned by Ideahub Inc., an NPE. The ‘539 patent relates to video coding techniques that apply linear method (LM) prediction modes and particularly to the prediction of a chroma pixel value using a LM chroma mode or a low-pass-filtered LM chroma mode. It has been designated as essential to the VVC standard in the Access Advance’s VVC patent pool.

Unified is represented by Dagim Tilahun and Jon Bowser of Haynes and Boone, and by in-house counsel, Jessica L.A. Marks and Michelle Aspen, in this proceeding.

Dolby VVC patent revoked in EPO

On November 30, 2023, the European Patent Office revoked all claims of EP 3675491, owned by Dolby International AB. EP ‘491 generally relates to video coding techniques that use data hiding to decrease bandwidth. The patent is related to patents that are designated essential to the Access Advance patent pool and has also been identified as potentially essential to the Versatile Video Coding (VVC) standard.

Unified was represented by Harry Hutchinson and Andrew McGettrick at HGF Law, and by in-house counsel, Jessica L.A. Marks and Roshan Mansinghani.

ETRI/HBNU patent challenged

On September 28, 2022, Unified filed a petition for post grant review (PGR) against U.S. Patent 11,212,553, owned by the Electronics and Telecommunications Research Institute (ETRI) and Hanbat National University Industry-Academic Cooperation Foundation.  The ‘553 patent is directed to decoding methods and apparatuses that use intra-prediction to reconstruct an image. The ‘553 patent is a recently issued patent that has been identified as potentially essential to the Versatile Video Coding (VVC) standard.

To read the petition and view the case record, see Unified's Portal.  Unified is represented by Raghav Bajaj, Jonathan Bowser, Destiny Stephenson, and Angela Oliver of Hayes Boone, and by in-house counsel, Jessica L.A. Marks and Roshan Mansinghani.

Dolby HEVC patent challenged in the EPO

On July 5, 2022, Unified filed an opposition proceeding against EP 3694209 B1, currently owned by Dolby International AB. EP ‘209 generally relates to video coding techniques that use data hiding to decrease bandwidth. The patent is related to others that have been designated essential to the Access Advance (HEVC) pool. EP ’209 has also been identified as potentially essential to the Versatile Video Coding (VVC) standard. This filing is a part of Unified’s ongoing efforts in its SEP Video Codec Zone.

Unified is represented by Dr. Andrew McGettrick at HGF Law, and by in-house counsel, Jessica L.A. Marks and Ellyar Barazesh.