Those who understand technology best protect it best.
Since 1965, under one roof.
About Our Firm
AJU KIM CHANG LEE has built an outstanding reputation in Korea and abroad for patent, trademark, design, copyright, and IP litigation. As one of Korea’s largest and most experienced IP firms since 1965, we provide world-class one-stop intellectual property services.
Learn more about the firmFor over 61 years, we have built strong, trust-based relationships with clients, delivering intellectual property services grounded in integrity and long-term commitment.
From patent and trademark prosecution to trials, litigation, and technology licensing — we handle every stage of IP protection under one roof.
Our network of 150+ partner firms worldwide ensures your intellectual property receives protection in every market that matters to you.
IP Report
Featured Report
To enhance the efficiency of IP administration in the era of the Fourth Industrial Revolution—and to consolidate IP-related functions that had been dispersed across multiple ministries...
February 12, 2026
The defendant filed a trial for invalidation of the plaintiff's registered patent titled 'Pharmaceutical Combination of an Angiotensin Receptor Antagonist and an NEP Inhibitor,' arguing that the patent violated specification disclosure requirements.
February 12, 2026
For notices of reasons for refusal issued by examiners on or after July 11, 2025, the period for submitting a written opinion in response is extended from 2 months to 4 months.
February 12, 2026
According to the December 2025 IP statistics trend report released by the Korean Intellectual Property Office (KIPO), the cumulative number of applications across patents, utility models, designs,
February 12, 2026
Our Professionals
Our team of patent attorneys and IP litigators, specialising in mechanical, electrical, chemical, and biotechnology fields, delivers world-class one-stop IP services.
From identifying and building an IP portfolio to filing and registering patent, design, and trademark rights, handling trials and enforcement, conducting search and analysis, and advising on assignments, licensing, and foreign applications — we provide the experience and expertise your success requires.
For almost any issue, AJU KIM CHANG LEE has specialization in the related technical fields and provides tailored advice for patent, trademark, and design prosecution.
Explore Prosecution (Patents, Trademarks, and Designs)
AJU KIM CHANG LEE's litigators represent clients before KIPO and the Patent Court of Korea in invalidation, refusal, revocation, and scope-confirmation matters.
Explore Trials and Litigation
AJU KIM CHANG LEE advises clients on enforcement proceedings, notices, preliminary injunctions, permanent injunctions, damages, and related civil and criminal remedies.
Explore Enforcement
AJU KIM CHANG LEE supports effective technical and business strategies through state-of-the-art research, prior art review, patentability analysis, claim-scope analysis, and FTO risk assessment.
Explore Search and Analysis
AJU KIM CHANG LEE assigns transfer and licensing matters to dedicated working groups of patent attorneys, attorneys-at-law, and consultants.
Explore Assignments and Licensing
AJU KIM CHANG LEE supports Korean and international companies through a worldwide network of foreign law firms and broad experience in international IP protection.
Explore Foreign ApplicationFor almost any issue, AJU KIM CHANG LEE has specialization in the related technical fields and provides tailored advice for patent, trademark, and design prosecution.
Explore Prosecution (Patents, Trademarks, and Designs)
