Trademark

Chang Tsi is widely recognized for its professionalism, efficiency, and deep expertise in trademark law, consistently ranked by leading international legal directories as a top trademark service provider in the Greater China region. We offer comprehensive domestic and international trademark services, including registration, portfolio maintenance, market monitoring, commercial investigations, administrative enforcement, customs recordation, infringement litigation, licensing, IP due diligence, and strategic brand development. By combining in-depth legal knowledge with precise execution, we help clients build resilient brand asset systems and achieve global trademark protection and value growth through structured strategies and proactive risk management.

Services We Can Offer

  • Strategy development for overall trademark protection, prosecution and enforcement
  • Worldwide trademark rights verification and maintenance, trademark protection planning and global registration services
  • Trademark searches and monitoring
  • Trademark prosecution at home and abroad
  • Handling trademark oppositions, reviews, disputes and cancellation proceedings
  • Filing appeals against administrative decisions
  • Renewing trademark applications and recording changes of address
  • Recording trademark registrations at Chinese customs, and training customs officials on how to identify genuine and counterfeit products
  • Conducting trademark infringement investigations and evidence collection
  • Handling trademark administrative actions (including AIC, quality inspection, public security, customs), including raids of manufacturers and vendors of counterfeit products
  • Handling trademark infringement litigation and assisting on criminal prosecution cases
  • Drafting, revising, and reviewing trademark related agreements, including trademark assignments, and licenses
  • Intellectual property due diligence in business transactions such as investments, mergers and acquisitions
  • Trademark licensing and franchise strategy

Representative Cases

  1. Invalidation Case Against Plagiarizing OREO's Trademarks [2023 Top 10 IP Cases by Wuxi Municipal Court and 2023 Top 10 IP Cases by Beijing Xicheng District Lawyers Association]
  2. Chen's Retrial Case of Selling Counterfeit Trademarked Goods [2022 Top 10 IP Cases by Chongqing Municipal Court]
  3. Baidu v.s. Fujian Yongan Endian Co., Ltd. ["2022 Top 10 IP Cases" by Fujian Provincial People's Court]
  4. MICHAEL KORS v.s. Shantou Chenghai Jianfa Handbag Craft Factory [“Deal of the year”&“The Top Ten Intellectual Property Case with Research Value”&“Representative Case of the Year” recommended by the Supreme Court, Zhejiang High Court and Hangzhou Intermediate Court]
  5. Ambitmicro Technology Limited. v. Ambiq Micro,Inc. and Fujitsu Semiconductor (Shanghai) Co., Ltd. ["2019 Top 10 IP Cases" by Shanghai People's Court]
  6. Dongfang Xianglin v.s. Shenzhen Pagoda Orchard [2019 Top 10 Representative IP Cases]
  7. Chen’s sales of sanitary products with a “TOTO” counterfeit trademark [2019 Top 10 Representative IP Cases]
  8. Trademark Protection Project Regarding Request for Declaration of Trademark Invalidation for "Weixin (Wechat) " [2019 Top 10 Trademark Application Cases]
  9. Trademark Protection Project Regarding Request for Declaration of Trademark Invalidation for "Yi Kou Lian" [2019 Top 10 Trademark Application Cases]
  10. Administrative Lawsuit between IDEAL LIFE INC. and CNIPA on the Request for Declaration of Trademark Invalidation for “完美生活IDEAL LIFE”[2019 Top 10 Trademark Application Cases]
  11. Under Armour v. Fujian Tingfeilong [2018 Outstanding Trademark Cases, reported by New York Times, Wall Street Journal, Law360, etc.]
  12. Guinness World Records v. Chery Automobile: Trademark Infringement and Unfair Competition ["2017 Deal of the Year" by Chinese Business Law Journal]
  13. LEVI STRAUSS & Co. vs. Guangzhou City Yixuan Apparel Co., Ltd. and Liu Zuofu ["Outstanding Cases" by Guangzhou IP Court]
  14. Infringement of Tupperware’s Trademark [2017 Top 10 Representative IP cases of Procuratorates in China]
  15. Administrative Dispute over the Request for Declaration of Invalidation of the Trademark “蒂凡尼”(Tiffany) [Representative Cases against Malicious Trademark Registration]
  16. Trademark Infringement Case on behalf of Six Continents Hotel  ["2015 Deal of the Year" by Chinese Business Law Journal]
  17. BorgWarner v.s. Counterfeit Manufacturers [Top 10 Representative Cases in Shandong Province]
  18. Comprehensive Trademark Protection Work for the Tang Brand of Drinks ["2014 Deal of the Year" by Chinese Business Law Journal]
  19. Air China IP Protection Cases ["2010 Deal of the Year" by Chinese Business Law Journal]
  20. Well-known Trademark Recognition for DQ
  21. Well-known Trademark Recognition for LEGO
  22. Well-known Trademark Recognition for Kohler Co.
  23. Well-known Trademark Recognition for Cadbury
  24. Well-known Trademark Recognition for Skechers
  25. ConocoPhillips Trademark Infringement Case
  26. LEVI STRAUSS & CO. v.s. Zhuang Ruyin & Guangzhou City Xin Fan Cai Trading Company
  27. Skechers v.s. Spieth & Wensky Regarding the Trademark “S” Infringement Case
  28. 3M v.s. Deli regarding dispute of infringement of POST-IT trademark
  29. Guinness World Records v.s. Chery Automobile and Anhui Chery Automobile Sales Company Regarding Trademark Infringement and Unfair Competition 
  30. Carlisle Fluid Technologies, Inc. v.s. Xianju County Tewei Pneumatic Tools, Co., Ltd. and Its Affiliated Companies
  31. Draper Fisher Jurvetson (DFJ) v.s. Jingdong Qu Regarding Trademark Infringement and Unfair Competition
  32. Intercontinental Great Brand LLC v.s. Anhui Tongmai Foods Co., Ltd. for trademark infringement
  33. Encyclopedia Britannica Trademark Protection Project
  34. DEUX LUX Trademark Protection Project
  35. Kraft Foods Inc. Trademark Protection Case
  36. Retrial of Administrative Dispute Over Trademark Objection Review Regarding You Shi Tie (优事贴)
  37. Kohler Co. Trademark Protection Case
  38. DQ v.s. Guangzhou Kaimei Regarding Trademark Infringement
  39. Cadbury v.s. Yi Kou Lian & Beijing Hui Fu Yuan Regarding Trademark and Unfair Competition Dispute
  40. DQ v.s. Suzhou Xuerun (Trademark Protection Case)
  41. Guinness World Records v.s. Guangzhou Daming Lianhe Regarding Trademark Infringement
  42. Lei Yun Shang v.s. Shanghai Yujintang (Trademark Protection Case)
  43. Graco Trademark Protection Case
  44. Carlisle Fluid Technology Trademark Protection Case
  45. ConocoPhillips Trademark Protection Case
  46. Well-known Trademark Recognition for Honeywell
  47. Shenzhen Xinba Technology Co., Ltd. V.S. Shantou Xinyu Industry Co., Ltd.
  48. Air Miles International Trading B.V. v.s.. AIR CHINA LIMITED in Canada’s Federal Court

Trademark Clearance, Filing & Prosecution

We provide trademark clearance searches, legal risk assessments, and registration services across all major jurisdictions worldwide. Aligned with our clients' brand strategies, we design comprehensive global filing pathways and manage the entire process—from pre-filing compliance reviews to prosecution and office action responses—ensuring efficient and effective trademark registration and protection in China and internationally.

Services We Can Offer

  • Conduct comprehensive trademark similarity searches and legal risk assessments in Chinese, English, and other language contexts;
  • Design registration strategies including class selection and specification of goods/services;
  • Handle domestic and international trademark applications, office action responses, and rights confirmation procedures;
  • Provide legal support for refusals, oppositions, and other prosecution matters;
  • Assist clients in managing the entire trademark registration process.

Renewal & Maintenance

We assist clients with global trademark renewals, status monitoring, and rights maintenance. Our services include renewal deadline alerts, renewal strategy development, risk prevention for non-use or lapse, and administrative compliance support—ensuring that our clients’ trademark rights remain valid, compliant, and stable over the long term.

Services We Can Offer

  • Manage statutory renewal deadlines and submit renewal applications to maintain trademark validity;
  • Monitor expiration dates and set multi-cycle automatic reminders;
  • Assist clients in preserving evidence of use and defending against non-use cancellation actions;
  • Represent clients in revocation, invalidation, and dispute defense proceedings;
  • Provide lifecycle management and compliance guidance on trademark use.

Worldwide Portfolio Management & Strategy

We manage clients’ global trademark portfolios by establishing multi-tiered, region-specific protection frameworks aligned with their business growth. Our services include portfolio audits, rights mapping, coordination with local counsel, and centralized reporting systems to support strategic brand expansion.

Services We Can Offer

  • Support clients in developing global trademark strategies covering registration, enforcement, and extended protection;
  • Establish centralized trademark databases and classification systems to improve visibility and management efficiency;
  • Provide one-stop services for overseas filings, maintenance, and agent coordination;
  • Offer strategic planning and cost optimization for key jurisdictions;
  • Enable multinational brands to coordinate rights and control risks across legal systems.

Monitoring, Enforcement & Defense

We provide real-time trademark watch services to identify potential conflicts and infringements. We assist clients in taking swift action through oppositions, cancellations, and enforcement litigation. Whether in China or abroad, we focus on building agile and effective brand defense systems.

Services We Can Offer

  • Monitor new filings, similar marks, and online infringements across platforms;
  • Represent clients in oppositions, cancellations, invalidations, and administrative actions;
  • Combat counterfeiting, imitation, and bad-faith filings through targeted enforcement;
  • Assist in market investigations and evidence collection for infringement cases;
  • Handle civil trademark litigation, injunction applications, and administrative enforcement.

Domain Names & Digital Brands

We offer digital brand protection services, covering domain name registration strategies, cybersquatting countermeasures, UDRP/URS proceedings, and enforcement across social media and app platforms—safeguarding clients’ brand integrity in the digital sphere.

Services We Can Offer

  • Represent clients in UDRP, URS, and Chinese domain dispute arbitration proceedings;
  • Assist in recovering cybersquatted or maliciously registered domain names;
  • Develop digital brand protection strategies across search engines, social media, and e-commerce platforms;
  • Monitor fake websites, phishing links, and counterfeit brand content;
  • Facilitate takedown actions and help restore legitimate brand presence

Trademark Transactions

We advise on trademark licensing, assignments, pledge financing, and brand-related transactions to help clients commercialize and maximize the value of their trademark assets. Our services include contract drafting, due diligence, ownership recordation, and execution of cross-border transactions.

Services We Can Offer

  • Assist clients with trademark licensing, assignment, pledge, and co-branding transactions;
  • Draft, review, and negotiate trademark contracts and commercial authorization agreements;
  • Provide brand valuation advice, licensing system development, and revenue model design;
  • Conduct trademark due diligence and commercial investigations;
  • Help clients commercialize trademark rights and maximize brand asset value.