LEADING IP LAW FIRM IN KOREA
Y.P. Lee, Mock & Partners is an IP law firm providing a full range of services in all fields related to intellectual property. The firm consists of around 340 employees, including more than 170 IP attorneys and attorneys-at-law, working together to provide the firm’s full range of services to the full satisfaction of both domestic and overseas clients.
Y.P. Lee, Mock & Partners has been often referred to as the largest IP law firm in Korea, but this is only one of the many ways to describe our firm. We have always strived to provide quality services to our clients. Since our inception in 1985, we have evolved and grown in size, but our motto of “Best Service to the Full Satisfaction of the Clients” has remained the same.
Comments from our foreign clients such as “The applications prepared by your firm are better than any other ones from Korea” and “We have no reservation in recommending your services to our clients” are among the most honorable accolades we have received.
UNDERSTANDING CLIENTS
Y.P. Lee, Mock & Partners is dedicated to fully understanding the needs and concerns of our foreign clients, many being Fortune 500 companies. Providing a high quality prosecution service in order to obtain strong and effective IP protection for our foreign clients requires much more than simply overcoming language barriers. Our IP attorneys possess a wide range of legal expertise in various IP legal systems as well as in-depth knowledge of various technical fields, and they offer a dedicated service to meet the demanding challenges faced by each of our foreign clients.
INTERNATIONAL EXPERIENCE AND NETWORK
Y.P. Lee, Mock & Partners annually handles around 7,100 overseas patent and trademark applications around the world through hundreds of our foreign associates. Our abundant experience of foreign prosecution and in-depth understanding of various foreign IP systems enable us to provide effective and reliable services to our numerous domestic and foreign clients.
FULL COVERAGE OF IP MATTERS
The spectrum of our service covers all aspects of intellectual property and technology. Our professionals’ knowledge and experience cover a wide range of technologies, such as biotechnology, pharmaceuticals, materials, chemistry, electrical engineering, mobile communications, nanotechnology, computer hardware and software, semiconductors, mechanical engineering, mechatronics, healthcare related technology, and so on. Highly experienced trademark attorneys also provide quality services for trademark cases.
In addition to our strong prosecution practice, for which we have been ranked as a top tier firm in Korea by several IP survey institutions, we are also active in technology and IP rights analysis, performing due diligence, IP consulting, licensing, IP portfolio management and more.
STRENTH IN IP DISPUTES
Y.P. Lee, Mock & Partners provides well reputed service in IP dispute matters. In collaboration with Yulchon, a top tier litigation firm that we formed a strategic alliance with in 2008, our litigation team has handled a number of high profile IP dispute cases, including Apple Inc. v. Samsung Electronics, in Korea.
OUR VISION
Members of Y.P. Lee, Mock & Partners share a unified vision and the same values. One of our principal objectives is to serve our clients by establishing stable, reliable, and long-term relationships. Another is to understand and anticipate our clients’ needs and interests and to continuously enhance our services to fully satisfy every need of our clients.
Founded in 1977, Lee & Ko is a premier full-service law firm in Korea. With more than 880 professionals organized into 40 specialized teams, Lee & Ko is consistently ranked in the top tier in all of its leading practice areas by international publications. Lee & Ko’s foreign and domestic clients benefit from its incomparable breadth and depth of resources, experience and professionalism.
With more than 100 seasoned patent and trademark attorneys, Lee & Ko’s IP group delivers superior legal services focused on helping clients to navigate the complex legal landscape by providing practical and effective solutions. The IP group is dedicated to the protection, transfer, counselling and enforcement of IP rights. With unrivalled experience in advising and representing clients in cross-border patent/trademark disputes and IP prosecution, the IP group has a global reach and is consistently ranked in top-tier categories for intellectual property by numerous global law firm evaluators, including the Legal 500, Asialaw Profiles (Euromoney), Chambers & Partners, IAM, WTR, and Managing Intellectual Property.
Patent prosecution and patent office trials
The IP group assists clients in multiple industry sectors, including biotechnology, specialty chemicals, semiconductors, materials science, electronics, mechanical, pharmaceuticals, telecoms and computer software. The IP group’s patent attorneys have significant experience litigating before the Korean Intellectual Property Office (KIPO) in invalidity and scope confirmation actions and freedom-to-operate analysis. The breadth and scope of their experience allow the IP group’s patent attorneys to create robust patents by evaluating patent applications during preparation, filing and prosecution with a critical eye towards enforcement. The combined prosecution, transactional and litigation experience enables the IP group’s patent attorneys to ensure that clients develop valuable patent portfolios which offer the broadest protection while ensuring patent validity and enforceability.
Patent litigation, enforcement and dispute resolution
Success in any litigious matter can mean many things. However success is defined, the IP group produces results for its clients. The IP group understands that clients need a trial team with substantial technical and scientific knowledge, but also substantive knowledge of the law and the rules and procedures governing legal proceedings. Many of the IP group’s litigators have strong technology related backgrounds and skills which cover a wide range of technical fields. The IP group also includes litigators who were former judges specializing in IP law and IP cases while serving on the Supreme Court, the Patent Court or the Seoul High Court, as well as former examiners and administrative law judges from the KIPO. When criminal issues arise, the IP group works closely with attorneys in Lee & Ko’s white collar crime group who formerly served as public prosecutors. Complemented by insight received from senior lead litigators, many of whom have 20 to 30 years’ trial experience, and seasoned foreign legal counsels, the IP group is in a unique position to create an effective trial team that can provide comprehensive legal services framed by technical, strategic, judicial, administrative and international perspectives.
Patent development and counselling
The IP group assists clients in developing and deploying a portfolio of strategic IP assets. Beyond the knowledge of IP matters and underlying technology, the IP group is fully aware that a key component to the success of any client includes the strategic use and licensing of its IP portfolio. The IP group has unrivalled experience in negotiating licensing, distribution and joint venture agreements covering all areas of intellectual property. Besides licence negotiation and drafting, the IP group provides counselling for clients on licensing strategies, IP-related competition law issues and strategic product development and distribution.
Trademark prosecution and portfolio management
Lee & Ko offers strategic counselling, trademark prosecution and portfolio management services to clients around the world. Through its network of international law firms, Lee & Ko currently advises numerous multinational and Korean clients across various industries on trademark prosecution matters in more than 50 countries.
IPTAB practice
Lee & Ko has decades of trademark litigation experience before the Korean Intellectual Property Trial and Appeals Board (IPTAB) and has successfully represented multinational clients as part of its worldwide campaigns involving a series of IPTAB actions. Lee & Ko provides positive results but also coordinates legal strategy with other disputes pending around the world.
Comprehensive judicial enforcement of trademark and related rights
Lee & Ko’s trademark team provides comprehensive enforcement solutions by integrating its investigations, enforcement and regulatory teams. Experienced Lee & Ko attorneys in both civil and criminal litigation formulate the best enforcement strategies tailored to each client’s unique circumstances and needs. Lee & Ko’s team works closely with its criminal practice team to instigate criminal proceedings when appropriate and to gather evidence that may be used to later establish civil liability and support any damages claims. This approach is critical because there is no practical means of civil discovery in Korea. Lee & Ko’s attorneys based in Korea, China and Vietnam provide monitoring services on the production and distribution of infringing goods and counterfeits in these countries and other nearby regions. Lee & Ko’s Chinese and Vietnamese lawyers also provide legal expertise in the relevant local laws.
Customs and border management
Lee & Ko’s trademark team is experienced in pursuing customs and border protection measures when appropriate. These may be pursued along with civil and criminal litigation under the Trademark Act and the Unfair Competition Act. Numerous Lee & Ko professionals have extensive experience working with the Korean customs authorities and former high-ranking officials who provide invaluable insight on this issue.
Lee & Ko’s highest priority is to build lasting relationships with clients by being responsive to each client’s specific needs. The firm has a well-earned reputation for successfully handling landmark matters in many of the most important transactions and cases involving business both in Korea and worldwide. Lee & Ko’s fully integrated team of legal experts – with specialties including tax, fair trade law, antitrust and competition matters, criminal enforcement and defense, as well as corporate practice – is well-suited to protect clients’ trademarks, brands and worldwide reputations.
BKL is one of the very few Korean law firms providing fully-integrated IP legal services and has steadfastly maintained such tradition since the inception of our practice in the 1990s. Our IP practice consists of prosecution, litigation and transactions involving all areas of IP.
IP Litigation and Dispute Resolution:
With four prominent former judges specializing in IP on our team (Messrs. Taeck Soo Kwon, Myung Kyu Lee, Kijoong Kang and Junghi Park), BKL has one of the nation’s most renowned IP litigation/dispute resolution practices. Particularly strong in representing clients in the pharmaceutical and high-tech industries, the depth and prestige of our practitioners in this area has set us apart from other IP practices in Korea. Also included in this area is our trade secret practice which encompasses all aspects of litigation, investigation and legal compliance involving trade secrets, in both civil and criminal contexts. The key members of our trade secret practice team are Ms. Jihyun Kim and Mr. Tae Uk Kang, both of whom are also former judges.
IP Transactions:
BKL's IP transactions lawyers provide clients with deep and broad experience in negotiation of IP licence, due diligence, IP audits, and the development of IP portfolio strategies. Our transactional practice advises many of the market-leading companies in the entertainment & sports sectors in connection with IP licensing and technology transfers. Messrs. Mun Ki Nam, Tae Uk Kang and Ingi Min are partners specializing in IP transactions.
IP Prosecution:
As an integral part of our IP practice, our IP prosecution team has represented a number of multinational corporations from a wide range of technical fields, including engineering, electronics, manufacturing, and chemical/pharmaceutical/biomed. Collaboration between our patent prosecution attorneys and other BKL practice groups ensures provision of balanced and comprehensive legal services to our clients.
Trusted Partner for Your Global IP Needs
Lee International is one of the most established and internationally recognised intellectual property law firms in Korea. Since our founding in 1961, we have built a strong reputation for delivering end-to-end IP services—spanning prosecution, litigation, enforcement, and transactions—with strategic insight and technical excellence.
Our key strengths include:
Deep Bench of Technical Experts
Our team comprises patent attorneys, former KIPO (Korean Intellectual Property Office) examiners, litigators, and in-house technical specialists with advanced degrees and industry backgrounds in engineering, biotechnology, pharmaceuticals, semiconductors, and industrial design.
Integrated Services Across the Full IP Lifecycle
From patent and trademark filing to portfolio management, dispute resolution, and cross-border brand protection, we provide tailored solutions throughout the entire IP value chain.
Global Client Focus
We represent Fortune 500 companies, innovative startups, and leading multinational brands. Our team is particularly experienced in handling complex, cross-jurisdictional matters and ensuring seamless coordination for clients with business interests in Korea and abroad.
Cost-Efficient, High-Quality Outcomes
Clients consistently rely on our ability to deliver business-driven results that are both practical and cost-effective, without compromising on legal or technical quality.
Proactive Monitoring and Enforcement
Leveraging in-house monitoring systems and our expertise in Korea’s Unfair Competition Prevention Act (UCPA), we identify and address potential infringement across sectors—including digital, e-commerce, and social media platforms—before they escalate.
At Lee International, we go beyond traditional IP representation. We are committed to enhancing the long-term value of our clients' intellectual property assets and empowering their growth through strategic, forward-thinking legal counsel. Our dedicated IP TechCenters ensure we stay at the forefront of innovation across sectors such as semiconductors, life sciences, mobility, and digital technologies..
Lee International IP & Law Group is recommended for contentious and non-contentious IP work. Managing partner Terry Taehong Kim leads the patent department. He specialises in electronics and mechanics. Senior partner Jin-Hoe Kim is an experienced patent attorney with expertise in chemistry biology and pharmaceuticals.