Lee International IP & Law

South Korea

Poongsan Bldg, 23 Chungjeongro, Seodaemun-gu
South Korea


Contact Us

Web Address:

Visit website


Lee International IP & Law Group was founded in 1961, making it one of the oldest and well-established law firms in Korea. Since its establishment, Lee International has provided clients with expert legal services covering every facet of IP law and beyond, and it is recognized by clients as one of the premier law firms in Korea. Lee’s practice has continuously grown and expanded to meet the evolving needs of domestic and international clients. Lee International offers a full range of legal services applicable to modern international business, including advice and representation in finance, real estate, M&A, general corporate, antitrust and fair trade, health care, domestic and foreign litigation and international arbitrations, labor, tax, general commercial matters, entertainment, customs, international trade remedies, government investigations, criminal matters and other areas. These practice areas are, of course, in addition to our long-standing intellectual property practice. Lee International remains a leader in Korean IP law practice, with one of the largest and most active practices for patents, utility models, designs, trademarks, domain names, copyright and trade secrets. Lee International has also been actively involved in licensing, IP portfolio development and management and a wide range of other IP-related matters. Lee International is renowned for its exceptional service and cost-efficient handling and resolution of IP disputes for clients seeking to protect and enforce their IP and related rights in Korea.


Client relationships

Lee International partners with clients to achieve their goals. Clients are kept fully informed and play an integral role in all aspects of the decision-making process. Lee International understands that clients’ successes equate to its own success, and it continues striving to build strong partnerships with clients to assist them in realizing their business goals in Korea..


Highly qualified professionals

Lee International’s professionals include both Korean and foreign-qualified lawyers, patent attorneys and a wide range of advisers and experts with many years’ experience working with clients to devise creative solutions to complex legal issues. Lee International’s patent practice group consists of 60 patent attorneys and 10 litigation lawyers, who are supported by 150 technical engineers and administrative staff members.


Electronics and IT practice group

The electronics and IT practice group handles patents and utility models in the technical fields of electronics and information technology. Its subject-matter expertise encompasses semiconductor devices, semiconductor manufacturing devices and processes, optics, electronic devices, wireless communications, communication standards, network systems, communication security, cloud computing, the Internet of Things, big data, computer-related inventions (including business methods) audio and video codec, signal processing, displays and multimedia, among other things. Members of the group are continuously updating their knowledge base in emerging technologies. The electronics and IT practice group represents global companies in the United States, Japan, Europe, China and Taiwan in all aspects of intellectual property.


Mechanical engineering practice group

Lee International’s mechanical engineering practice group includes some of the best and brightest patent attorneys, with strong technical and scientific backgrounds and diverse experience in relevant fields. The  group provides the highest-quality legal services to protect clients’ rights in the fields of automobile parts, semiconductor manufacturing devices, air conditioning and refrigerating equipment, medical appliances, display devices, optical techniques, steel, non-ferrous metals, alloys, preparation processes and materials recovery facilities, light-emitting diode packages, organic light-emitting diode packages and sports equipment. The patent attorneys in the mechanical engineering practice group do their utmost to fulfil clients’ needs in various IP-related areas.


Chemical practice group

The chemical practice group boasts a formidable roster of attorneys who have extensive legal experience and technical expertise across a wide spectrum of technologies, encompassing organic chemistry, inorganic chemistry, polymers, chemical processes, semiconductors and display material science, biochemistry, pharmaceuticals, biotechnology, agrochemicals and food. The group provides customized patent strategies for clients' patent prosecution and effective enforcement of patent rights. The group has assisted various clients in pharmaceutical regulatory matters, including the Patent and Marketing Approval Linkage System before the Ministry of Food and Drug Safety.


The chemical practice group is recognized by clients for its comprehensive legal services and responsiveness. The group’s attorneys are specialized in communicating with US, European and Japanese clients and maintain close working relationships with clients. The group’s attorneys have endeavored to make improvements to patent practice in Korea in order to more effectively protect clients’ IP rights by actively communicating with the Korean Intellectual Property Office and Korean courts and offering opinions on the revisions of laws and regulations.


Global Network

Lee International draws upon a global network of law firms and other professional organizations, which provide Lee International with expertise from all over the world.


Mechanical engineering practice group

  • Automobile parts semiconductor manufacturing devices
  • Air conditioning and refrigerating equipment
  • Medical appliances
  • Display devices
  • Optical techniques
  • Steel
  • Non-ferrous metals
  • Alloys preparation processes and materials recovery facilities
  • Light-emitting diode packages
  • Organic light-emitting diode packages and sports equipment.

 Electronics and IT practice group

  •  Semiconductor devices
  • Semiconductor manufacturing devices and processes optics
  • Electronic devices wireless communications
  • Communication standards network systems
  • Communication security
  • Cloud computing

 Chemical practice group

  •  Organic chemistry inorganic chemistry polymers
  • Chemical processes
  • Semiconductors and display material science
  • Biochemistry
  • Pharmaceuticals
  • Biotechnology
  • Agrochemicals and food


General Team Capacity

Our team capacities are written below.


Strong Prosecution Capability

In 2015, Lee International prosecuted more than 4,100 applications.


Comments and Analysis on an Office Action

Lee International provides proposed amendments with available options for our clients.


Effective Communication

Many of our attorneys are bilingual and can effectively communicate in English or Japanese.


Extensive Patent Litigation Experience

Lee International has extensive experience in patent litigation, including enforcing/defending patent claims including injunctive relief and damage for patent infringement, patent invalidation trials and confirmation-of-scope trials.


Innovative Patent Strategy Counseling

Lee International provides customized strategies for our clients' patent prosecution as well as effective enforcement of patent rights in Korea. Lee International has a full understanding of the needs and concerns of foreign based clients.


Diverse Practice Areas


Lee International handles complex licensing matters, acquisitions and divestitures of IP, and technology transactions including development, alliance and distribution agreements.

Patent Search/ Opinions

Lee International conducts invalidation searches and freedom-to-operate searches, and provides non-infringement and invalidity opinions.