On May 19, 2017, ZTE held separate resolutions regarding the 'Image Coding Method, Image Decoding Method and Apparatus' (Patent No. 02802818X) and the 'Dynamic Image Decoding Device and Method' (Patent Number : 2006101007963) A total of two patents, the Patent Reexamination Board filed a request for invalidation.
On December 13, 2017, the Patent Reexamination Board released the review decision on the above two patents, and the result was "to maintain part of the validity and to declare the partial invalid".
In addition, prior to this, around the unresolved patent litigation dispute between ZTE handset and Hitachi's Hitachi Maxell in the United States, ZTE also announced two of the patents involved, namely "camera module and camera device" 2007101961773) and 'Camera Components' (Patent No .: 028155475) filed an invalidation claim with the Patent Reexamination Board in China, and the result was also "to maintain the patent's validity".
Li Junhui said that it can be said that the review of the invalidation announcement initiated by ZTE's four patents related to overseas litigation is not optimistic. More than half of the patents have been maintained and some are still valid.