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Our IP invalidation and litigation team is composed of seasoned professionals, including senior patent and trademark attorneys with extensive search experience, a number of former patent and trademark examiners, and former judges. This unique combination of search, examination, and judicial expertise enables us to handle complex IP disputes with strong practical insight.
The team focuses on patent invalidation, patent infringement litigation, patent administrative litigation, trademark infringement litigation, trademark administrative litigation, unfair competition litigation, and trade secret litigation. We also assist clients in formulating corporate IP litigation strategies, conducting IP infringement analysis and investigations, assessing the stability of patents and trademarks, performing stability searches, and providing related IP consulting services.
To date, our team has handled more than 4,000 IP disputes, achieving a win rate of over 80% in invalidation and litigation matters.
Patent Administrative Litigation
Patent Infringement Litigation, Patent Infringement Dispute Administrative Settlement
Patent Ownership Disputes, Patent Inventor Attribution Disputes
Online Platform Infringement Complaints
U.S. 337 Investigation
Foreign-related Intellectual Property Litigation
Foreign-related Patent Invalidation
Trademark Administrative Litigation
Trademark Infringement Litigation
Trademark Counterfeiting
Trade Secret
Unfair Competition Litigation
Antitrust Litigation
Cultural Film Infringement Litigation
Software Copyright Litigation
Comprehensive Legal Services
Intellectual Property Legal Counsel
Patent Infringement Analysis / FTO Analysis
Non-Infringement Legal Opinions
Service Advantages
Sunshine Team
Sunshine IP contains a litigation team composed of senior lawyers, patent attorneys, and technical experts. The team members include former Intellectual Property judges, senior examiners, and industry experts, who have solid professional backgrounds and rich practical experience, ensuring high-level legal services in complex cases.
Full-chain services, customized solutions
From case analysis, evidence preparation to court defense, Sunshine IP offers comprehensive legal litigation services covering the entire process. Based on client needs, we provide precise and efficient litigation strategies to help clients maximize their rights protection while minimizing potential legal risks.
Classic cases
Over the years, Sunshine IP has successfully represented thousands of litigation cases with significant influence in the industry. Many of these cases have been selected as typical cases by the Supreme People's Court and among the top ten patent reexamination and invalidation cases nationwide. These cases not only demonstrate Sunshine IP professional strength but also build strong confidence for its clients.
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Rec News
Recently, an administrative dispute over the invalidation of an invention patent right, jointly represented by Beijing Sunshine IP Intellectual Property Agency Co., Ltd. and Beijing Sanju Law Firm, has been finally settled. The Supreme People's Court issued the administrative judgments (2024) Supreme People's Court Intellectual Property and Administrative Affairs Final 1244 and (2024) Supreme People's Court Intellectual Property and Administrative Affairs Final 1245, dismissing the appeal of Shenzhen Quanwei Intellectual Property Operation Co., Ltd. and upholding the original judgment of the first instance.
Recently, a patent invalidation administrative dispute involving an invention patent right between a third party represented jointly by Beijing Sunshine IP Intellectual Property Agency Co., Ltd. and Beijing Yiju Law Firm and Kubota Corporation was finally concluded in the second instance. The Supreme People's Court made the (2024) Supreme People's Court Intellectual Property and Administrative Affairs Final 361 administrative judgment, dismissing Kubota Corporation's appeal and upholding the first-instance judgment.
Recently, a patent invalidation administrative dispute over an invention patent right between a third party represented jointly by Beijing Sunshine IP Intellectual Property Agency Co., Ltd. and Beijing Yiju Law Firm and Jiufang Taihe International Heavy Industry (Qingdao) Co., Ltd. was finally concluded in the second instance. The Supreme People's Court made the administrative judgment (2023) Supreme People's Court Intellectual Property and Administrative Affairs Final 1187, dismissing Jiufang Taihe's appeal and upholding the first-instance judgment.
Recently, Beijing Sunshine IP Intellectual Property Agency Co., Ltd. and Beijing Yiju Law Firm jointly represented Zhuhai Coslight Battery Co., Ltd. in a dispute over the infringement of an invention patent right, which has now concluded at the final instance. The Supreme People's Court made the civil ruling (2023) Supreme People's Court of Intellectual Property Civil Appeal No. 2589, revoking the civil judgment (2022) Fujian 01 Civil Initial 1647 of the Fuzhou Intermediate People's Court of Fujian Province, and dismissing the lawsuit filed by Ningde New Energy Technology Co., Ltd.
Patent invalidation litigation service agency worth recommending
Cases selected as typical cases in "Analysis of Patent Authorization and Confirmation Trials 2014-2024"
Standard essential patent infringement case awarded LegalOne Exemplary rating
Selected as one of the top ten patent reexamination and invalidation cases by the National Intellectual Property Administration in 2023
