Context: ASUS and related patent holders targeted Xiaomi and OPPO in Europe in 2025; Xiaomi settled that November, while OPPO fought back (April 4, 2025 ip fray article; December 17, 2025 ip fray article). In Germany, ASUS affiliate Innovative Sonic Corporation (ISC) obtained an injunction against OPPO and OnePlus, while OPPO secured a 5G infringement ruling against ASUS (March 27, 2026 ip fray article; March 13, 2026 ip fray article). The ASUS side also brought two UPC actions and extended its campaign to India. OPPO’s Chinese counteroffensive covers fast charging, Versatile Video Coding (VVC), 5G, and radio-frequency technology in Tianjin, Zhengzhou, Shanghai, and Ningbo, with additional proceedings in Beijing and Wuhan confirmed to ip fray by a source close to the matter.
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Counsel
The identified teams vary by proceeding.
Germany
ASUS v. OPPO and OnePlus, 21 O 2344/25: ASUS is being represented by Arnold Ruess (ip fray firm profile), including Dr. Marina Wehler, Dr. Arno Risse, Dr. Lisa Rieth, Dr. Julius Winkler, Victoria Thuesing and Felix Koetterheinrich, together with a Cohausz & Florack patent attorney team led by Dr. Christoph Walke. Dr. Jan Phillip Rektorschek, now at PENTARC (ip fray firm profile), represents OPPO and OnePlus.
ISC v. OPPO and OnePlus, EP2802185: ISC’s team comprises Wildanger’s (ip fray firm profile) Dr. Alexander Reetz, Peter-Michael Weisse, Dr. Eva Maria Thoerner and Julia Mauelshagen, together with Cohausz & Florack’s Dr. Christoph Walke and Dr. Martin Ruetten. OPPO and OnePlus are represented by Taylor Wessing’s Dr. Gisbert Hohagen, alongside Stefanie Engmann (now at PENTARC), together with Paustian patent attorney Christoph Hewel.
OPPO v. ASUS, EP3657687: Hogan Lovells (ip fray firm profile) Dr. Martin Faehndrich and Dr. Tobias Timmerscheidt represent OPPO in both infringement and nullity proceedings. ASUS is represented by Wildanger’s Ole Dirks and Anna Xu in the infringement action and KEENWAY Patentanwälte’s Tilman Taruttis in the nullity proceedings.
UPC
ISC v. OPPO, UPC_CFI_460/2025: The identified representatives include Wildanger’s Peter-Michael Weisse for ISC and Taylor Wessing’s Dr. Gisbert Hohagen for OPPO.
ATL v. OPPO, UPC_CFI_525/2025: ATL is represented by EIP Europe (ip fray firm profile), whose listed team includes Dr. Christof Hoehne and Isabelle Schaller, together with Arnold Ruess’s Dr. Marina Wehler, Dr. Arno Risse, Dr. Lisa Rieth, and Victoria Thuesing. Taylor Wessing’s Dr. Gisbert Hohagen is identified for the defendants.
China
Counsel for OPPO: Han Kun Law Offices in the Chinese infringement and invalidation proceedings.
Counsel for ASUS: Liu Shen & Associates in the Chinese infringement and invalidation proceedings.
India
Counsel for Celerity IP and its co-plaintiffs: Anand and Anand, including Pravin Anand, Vaishali Mittal and Siddhant Chamola.
Counsel for OPPO and its co-defendants: Saikrishna & Associates, including Saikrishna Rajagopal, Julien George and Anu Paarcha.