The Patent Trial and Appeal Board of the U.S. Patent and Trademark Office issued a final written decision ending an Inter Partes Review (IPR) trial and rejecting Unified Patents LLC’s challenge to U.S. patent No. 8,139,651.  The patent, owned by DivX LLC, protects an invention that improves the quality of decompressed video.  Unified Patent is a company whose business is challenging patents.  It challenged the ’651 patent after DivX had gone to court to seek compensation for infringement of the patent by companies paying membership fees to Unified Patents.  After a full trial, the Board rejected Unified Patents’s unpatentability arguments, finding that they were inadequate, were untimely, missed the point, improperly attempted to shift the burden to DivX, and failed to address express statements in documents of record.  The Board upheld the patentability of the claims.    DivX is represented by Parham Hendifar, Kenneth Weatherwax, and other attorneys of Lowenstein & Weatherwax LLP.  The Board’s February 8, 2021 decision may be accessed at this link.