Mr .Choi, after being appointed as a judge in 1986, spent 28 years in the court, contributing to the establishment of the Patent Court in Korea and being responsible for patent & trademark trials in the Seoul District Court of Korea, the Seoul High Court of Korea, and the Patent Court of Korea. His abundant experiences and expertise earned him the nickname of “the authority of intellectual property” by media.
Based on his thorough knowledge and experiences in intellectual property, he wrote about 50 papers and books on the practice as well as theory of intellectual property rights, and chaired the Information Law Society of Korea and the Intellectual Property Law Research Association of Korea.

- Intellectual Property
- Technology, Media and Telecommunications
- Intellectual Property Litigation
- Civil Litigation
- Administrative Litigation
- Criminal Litigation
- Tax Litigation

[Pharmaceutical/Chemical field]
- Preliminary injunction in patent infringement concerning “Topical ophthalmic formulations containing doxetin derivatives for treating allergic eye diseases” between ALCON RESEARCH, LTD./ALCON KOREA vs. HANLIM PHARMACEUTICAL (the Seoul Central District Court of Korea, 2011.10)
- Invalidation trial concerning “Inhibitors for Treatment of Benign Prostatic Hyperplasia” between JW PHARMACEUTICAL and MERK & CO. (the Patent Court of Korea, 2005.11)
- Invalidation trial concerning “Combined Vaccines Comprising Hepatitis B Surface Antigen And Other Antigens” between GLAXOSMITHKLINE BIOLOGICALS and BERNA BIOTECH KOREA /CHIRON CORPORATION (The Patent of Korea, 2006.6)
- Preliminary injunction in patent infringement concerning “Stable Micronized Candesartan Cilexetil” between TEVA PHARMACEUTICALS and CHONG KUN DANG PHARMACEUTICAL/KYUNGDONG PHARM. (the Seoul Central District Court of Korea, 2012.2)
- Cancellation trial for a decision of rejection concerning “MACROENCAPSULATED SECRETORY CELLS” by THE ROGOSIN INSTITUTE (the Patent Court of Korea, 2005.12)
- Cancellation trial for a decision of rejection concerning “Pharmaceutical Compositions and methods for treating neurodegenerative diseases” by AVENTIS PHARMA S.A. (the Patent Court of Korea, 2005.10)
- Cancellation trial for a dismissal decision on the correction of the patent invention of “Essential Oil Composition Having Functions Of Antibiosis And Antifungus” by BIOMIST TECHNOLOGY CO., LTD. (the Patent Court of Korea, 2005.10)
- Cancellation trial for a decision of rejection concerning “Single-Chain Forms Of The Glycoprotein Hormone Quartet” by WASHINGTON UNIVERSITY (the Patent Court of Korea, 2006.3)
- Cancellation trial for a dismissal decision on the invalidation of “AZITHROMYCIN DIHYDRATE Compounds” between CJ CORPORATION and PFIZER INC. (the Patent Court of Korea, 2006.5)
- Cancellation trial for a decision of rejection concerning “Treatment Of T-Helper Cell Type 2 Mediated Immune diseases With Retinoid Antagonists” by F. HOFFMAN-LA ROCHE AG (the Patent Court of Korea, 2006.8)
- Trial on the compensation of employee invention concerning “Amlodipine nicotinate for treating hypertension” between Chung and HANLIM PHARMACEUTICAL (the Seoul High Court of Korea, 2009.10)
- Cancellation trial for a non-confirmation decision for the scope of a right concerning “heat resistant materials” between KABUSHIKIKAISHA KUBODA and BOOGONG INDUSTRIAL (the Patent Court of Korea, 2005.8)

[Electric/Electronic field]

- Patent infringement & compensation for damages concerning “Reflector For A Surface Light Source” between TORAY INDUSTRIES, INC and SKC CO., LTD. (the Seoul High Court of Korea, 2009.10)
- Trial for disposal of products & compensation for patent infringement of “Composition And Slurry Useful For Metal CMP” between CABOT MICROELECTRONICS CORPORATION and CHEIL INDUSTRIES INC (the Seoul High Court of Korea, 2009.12)
- Trial for prohibition of production and disposal of products due to patent infringement of “Patent for substrate supporting means for manufacturing LCD and PECVD apparatus between APPLIED MATERIALS, INC. and JUSUNG ENGINEERING CO.,LTD.(the Seoul High Court of Korea, 2009.7.)
- Cancellation trial for a decision of rejection concerning “Method And Apparatus For Determining The Transmission Data Rate In A Multi-User Communication System” by QUALCOMM INC. (the Patent Court of Korea, 2006.6)
- Cancellation trial for a decision of rejection concerning “Conveying Apparatus For Electric Parts” by TOKYO WELD CO., LTD.( the patent Court of Korea, 2006.4)
- Cancellation trial for a decision of rejection concerning “Damascene Process For Reduced Feature Size” by ADVANCED MICRO DEVICES INC. (the Patent Court of Korea, 2006.10)
- Cancellation trial for a decision of rejection concerning “RF Coil And Magnetic Resonance Imaging Apparatus” by GE MEDICAL SYSTEMS GLOBAL TECHNOLOGY (the Patent Court of Korea, 2007.2.)
- Cancellation trial for a decision of rejection concerning “Magnetic Targeted Carrier” by FERX INCORPORATED (the patent Court of Korea, 2006.12)
- Cancellation trial for a decision of rejection concerning “Rotating Cup And Coating Apparatus And Coating Method” by TOKYO ELECTRON LIMITED (the Patent Court of Korea, 2006.12)
- Cancellation trial for a decision of rejection on the invalidation of “Microelectronic Contact Structure” between KABUSHIKI KAISHA NIHON MICRONICS and FORMFACTOR, INC. (the Patent Court of Korea, 2006.9.)
- Trial for cancellation of invalidation decision concerning “Device For Etching Disc-Like Articles” between SEZ AG and SEMES CO., LTD.(the Patent Court of Korea, 2007.1.)
- Employee Invention Compensation claim suit for “Fringe-Field Switching(FFS)” against HYDIS TECHNOLOGY/HYNIX (the Seoul High Court of Korea, 2009.6)
- Copyright infringement dispute on computer software between GION NETWORKS CO., LTD./FINANCIAL NETWORK SERVICE PTY.LTD. and TMAXSOFT (the Seoul High Court of Korea, 2009.5)

[Business-Method patent]

- Injuction against and compensation for patent infringement concerning “Web page retrieval and advertisement method using the issue number in the internet” between Lee and SK TELECOM (the Seoul High Court of Korea, 2009.12)
- Injuction against and compensation for patent infringement concerning “Credit settlement system using mobile communication number and approving method” between SPACENET INC. and MOBILIANS (the Seoul Central District Court of Korea, 2004.10)
- Preliminary injunction in patent infringement concerning “Method and system for connecting user's call and company's call” between PORTALTONE and TGRAPE (the Seoul Central District Court of Korea, 2011.6)
- Preliminary injunction in patent infringement concerning “Method for providing web accessibility service and system” between CAKESOFT CO.,INC and COMMUS C&C
- Cancellation trial for a decision of rejection concerning “Method for searching www site without domain name” by NETPIA, INC. (The Patent Court of Korea, 2005.9)
- Cancellation trial for a non-confirmation decision on the scope of “Payment apparatus and payment method for public imposts and giro” between CYBER CVS CO., LTD. And CHUNG HO COMPUTER CO., LTD (the Patent Court of Korea, 2006.1)
- Cancellation trial for a decision of rejection concerning “A method/system of managing web sites registered in searchengine” by NAVER Corporation (the Patent Court of Korea, 2006.2)
- Cancellation trial for a decision of invalidation concerning “Method for Implementing Information and Knowledge Providing Service Through Internet” between EMPASS and NAVER CORPORATION (the Patent Court of Korea, 2006.8)
- Preliminary injunction in patent infringement concerning “FAX document management system and the method, and the store device which records a method” between JOY INTERNET CO., LTD. and SK TELECOM CO., LTD./ HANMAC SOFTWARE, INC. (the Seoul Central District Court of Korea, 2010.6)

[Machinery & other field]

- Claim for patent infringement compensation concerning “Mobile Station having Display Part Convertible Vertical into Horizontal” between NMCTEK CO., LTD./IMPACTRA CO., LTD .and SAMSUNG ELECTRONICS CO., LTD. (the Seoul High Court of Korea, 2009.8)
- Claim for patent infringement compensation concerning “Tubing Joint” between KABUSHIKI KAISHA NIHON PISCO and SANG-A PNEUMATIC CO., LTD. (the Seoul High Court of Korea, 2009.8)
- Claim compensation for infringement of exclusive license concerning “Method For Increasing The Bearing Capacity Of Foundation Soils For Buildings” between URETEK KOREA and HS HOSEONG CONSTRUCTION (the Seoul High Court of Korea, 2009.6)
- Trial for injunction against infringement of utility model right & compensation for damages concerning “Assembly style door frame being easy to assemble and replace” between LAMIWOOD CO., LTD and SAMSUNG C&T CORPORATION (the Seoul High Court of Korea, 2009.8)
- Preliminary injunction in patent infringement concerning “Slide apparatus for mobile communication terminal” between ANYCASTING CO., LTD. and DIABELL CO., LTD/ KREMS CO., LTD (the Seoul Central District Court, 2011.8 & 2012.2-opposition to preliminary injunction)
- Preliminary injunction in patent infringement concerning “outer-wall construction apparatus for building” between BUHENG STONE MATERIAL TRUSS CO., LTD and EG STONE TRUSS CO., LTD. (the Seoul Central District Court of Korea, 2011. 6)
- Preliminary injunction in patent infringement concerning “Massage Apparatus” between CNK ELECTRONICS CO., LTD. and DAE KYUNG IND. (the Seoul Central District Court of Korea, 2012.1
- Preliminary injunction in patent infringement of patent & exclusive license concerning “System For Preparing A Fluid Intended For A Medical Procedure By Mixing At Least One Concentrate In Powder With Water” between GAMBRO LUNDIA AB/ GAMBRO KOREA and JW PHARMACEUTICAL CORPORATION (the Seoul Central District Court of Korea, 2010.7)
- Preliminary injunction in patent infringement concerning “Antenna for a mobile communication device” between Lim and SKYCROSS KOREA CO. LTD.( the Seoul Central District Court of Korea, 2011. 1)
- Preliminary injunction in patent infringement concerning “Shelf for depositing a keyboard” between Seo and GET M CO., LTD (the Seoul Central District Court of Korea, 2012. 1)
- Trial for cancellation of invalidation decision concerning “Dust Suction Device For An Electric Vacuum Cleaner” between SANYO ELECTRIC CO., LTD. and LG ELECTRONICS INC (the Patent Court of Korea, 2005.5)
- Cancellation trial for a dismissal decision on the invalidation of “Belt fitting for seat belt device” between KOMOTEK CO., LTD and ENSHU CO., LTD. (the Patent Court of Korea, 2005.12)
- Cancellation trial for a decision of rejection concerning “Securing Ring, Device For Fitting” by LUCAS INDUSTRIES LIMITED (the Patent Court of Korea, 2005.9)
- Cancellation trial for a dismissal decision on the invalidation of “A cleaning apparatus of fluid transport pipe in a condenser” between DASAN CO., LTD. and TAC KOREA CO., LTD (the Patent Court of Korea, 2005.7)
- Cancellation trial for a dismissal decision on the invalidation of “Instrument for measuring two dimensional deformation intunnels” between GTC CORPORATION CO., LTD. and DONG WOO TEC CO., LTD. (the Patent Court of Korea, 2005.12)
- Cancellation trial for a dismissal decision on the invalidation of “Recoverable Sealing Article” between ASIA TELECOM CO., LTD. and TYCO ELECTRONICS RAYCHEM KOREA LIMITED (the Patent Court of Korea, 2005.7)
- Confirmation trial for the scope of the patent concerning “Spring Hinge” between OBE OHNMÄCHT & BAUMGÄRTNER GMBH & CO. KG and Kim (the Patent court of Korea, 2006.7)
- Cancellation trial for a dismissal decision on the invalidation of “Reciprocating Piston Type Compressor” between HALLA CLIMATE CONTROL CORP and KABUSHIKI KAISHA TOYOTA JIDOSHOKKI (the Patent Court of Korea, 2006.5)
- Cancellation trial for a decision of rejection concerning “Artificial Turf” by FIELDTURF INC (the Patent Court of Korea, 2006.5)
- Cancellation trial for a dismissal decision on the invalidation of “Thread-feeding device” between Chang and MEMMINGER-IRO GMBH (The Patent Court of Korea, 2006.6)


[Trademark & Unfair Competition-related]

Decision of Rejection
- Cancellation trial for a decision of rejection concerning trademark by BOOKOFF CORPORATION (The Patent Court of Korea, 2005.4)

- Cancellation trial for a decision of rejection concerning emblem by FOUNDATION FOR THE MAINTENANCE OF THE JOGYE ORDER OF KOREAN BUDDHISM (The Patent Court of Korea, 2005.7)

- Cancellation trial for a decision of rejection concerning service mark by THE PRUDENTIAL INSURANCE COMPANY OF AMERICA (The Patent Court of Korea, 2005.6)

- Cancellation trial for a decision of rejection concerning trademark by WAL-MART STORES, INC. (The Patent Court of Korea, 2005.6)

- Cancellation trial for a decision of rejection concerning trademark ‘COLLAGENIC’ by PACIFIC CORPORATION (The Patent Court of Korea, 2005.4)
- Cancellation trial for a decision of rejection concerning trademark by BEAUTYBANK INC. (The Patent Court of Korea, 2006.9)


Invalidation Trial

- Cancellation trial of a dismissal decision on the invalidation of trademark SOLIDEA between CALZIFICIO PINELLI S.R.L and the anonymous (The Patent Court of Korea, 2005.7)

- Trial for cancellation of dismissal decision on the invalidation of trademark 아벤트 AVENT by CANNON RUBBER LIMITED and the anonymous (The Patent Court of Korea, 2005.9)

- Cancellation trial of a dismissal decision on the invalidation of trademark between REEBOK INTERNATIONAL LTD. and the anonymous (The Patent Court of Korea, 2005.9)

- Cancellation trial for an invalidation decision of trademark STARSUITE between the anonymousand SUN MICROSYSTEMS. INC. (The Patent Court of Korea, 2005.8)

- Cancellation trial for an invalidation decision of trademark “STAR JEWELRY” between KABUSHIKI KAISHA STAR JEWELRY and the anonymous (The Patent Court of Korea, 2005.9)

- Cancellation trial for a decision of invalidation trial between INTEL CORPORATION (prior registered trademark ) and DEEPAK PAWHA (trademark ) (The Patent Court of Korea, 2005.6)
- Cancellation trial for an invalidation decision on trademark between BESTFORD(HONG KONG) LIMITED), successor of EVISU JAPAN KABUSHIKI KAISHA and the anonymous (The Patent Court of Korea, 2006.5)

- Cancellation trial for a decision of invalidation trial between CAMBRIDGE CO., LTD. (prior registered trademark ) and THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE (trademark ) (The Patent Court of Korea, 2006.4)

- Cancellation trial for a decision of invalidation trial between GENNAIO SNCDI E C. (trademark ) and HEINEKEN BROUWERIJEN B.V (prior registered trademark ) (The Patent Court of Korea, 2006.12)
- Cancellation trial for a invalidation decision of trademark between PIGEON CORPORATION and DAEWOONG CO.,LTD (The Patent Court of Korea, 2007.1)

Confirmation trial for the scope of a right & Cancellation trial for trademark not in use

- Cancellation trial for a decision of confirmation trial that trademark (registered by ALPHA ART MATERIALS CO., LTD.) is outside the scope of (registered by ALPHA CO., LTD) (The Patent Court of Korea, 2005.9)

- Cancellation trial for a non-confirmation decision on trademark
(registered by DSI ENTERTAINMENT CO., LTD.) in the scope of (registered by ORION CORP) (The Patent Court of Korea, 2006.5)

- Cancellation trial for a dismissal decision on the cancellation of trademark not in use concerning “TEDECO” between DEDECO INTERNATIONAL , INC. and the anonymous (The Patent Court of Korea, 2005.5)


Injunction against infringement & compensation for damages

- Injunction against infringement ordering the anonymous to stop the use of mark registered by LOUIS VUITTON MALLETIER (the Seoul High Court of Korea, 2009.5)

- Injuction on infringement of trademark registered by K2 KOREA CO., LTD. ordering the defendant the anonymous to stop the use of and compensate for damages. (the Seoul High Court of Korea, 2009.10)

- Injunction against infringement of trademark & service mark “동부” between DONG BU CONSTRUCT CO.LTD and DONGBOO HOUSING CO., LTD. (the Seoul High Court of Korea, 2010.1)


- Trial for compensation for damages concerning mark “예술의 전당” between SEOUL ART CENTER and CHONGJU CITY, UI JEONGBU CITY & TAEJON METROPOLITAN CITY (the Seoul High Court of Korea, 2009.9)

- Injunction against infringement of “Louis Vuitton" and “LOUIS VUITTON” registered by LOUIS VUITTON MALLETIER (the Seoul Central District Court of Korea, 2004.12)

- Injunction against infringement of trademark , registered by FENDI ADELE S.R.L. (the Seoul Central District Court of Korea, 2004.7)

- Injunction against infringement of trademark 에이콘, ACORN registered by HEPWORTH BUILDING PRODUCTS INTERNATIONAL LIMITED (the Seoul Central District Court of Korea, 2004.11)
 Trial for compensation for damages concerning trademark registered by SALVATORE FERRAGAMO ITALIA S.P.A (the Seoul Central District Court of Korea, 2004.12)


Preliminary injunction

- Preliminary injunction against use of trademark registered by DIADORA SPORTS SRL (the Seoul Central District Court of Korea, 2011.4)

- Preliminary injunction against infringement of trademark registered by COSWELL S.P.A. (the Seoul Central District Court of Korea, 2011.10)

- Preliminary injunction for unfair competition concerning trademark by NEW BALANCE ATHLETIC SHOE, INC. (the Seoul Central District Court of Korea, 2011.9)

- Preliminary injunction against production and sale of Pee Trainer LITAF INDUSTRIES (the Seoul Central District Court of Korea, 2011.6)

- Preliminary injunction against infringement of trademark of “락카 Spray + 도형”registered by ILSHIN CO., LTD. (the Seoul Central District Court of Korea, 2010.5)

- Preliminary injunction against use of trademark of “UNITED COREA”by the anonymous against HYUNDAI MOTOR COMPANY, SAMSUNG TESCO, and BGF RETAIL CO.,LTD. (the Seoul Central District Court of Korea, 2010.10)
- Preliminary injunction against use of mark “동아TV” registered by DONGA TV CORP. against THE DONG-A ILBO (the Seoul Central District Court of Korea, 2010.12)

- Preliminary injunction against infringement of “MAXIM”registered by ALPHA MEDIA GROUP. INC. /DENNIS PUBLISHING, INC. (the Seoul Central District Court of Korea, 2010.10)

- Preliminary injunction against use of mark “YES! GOLF”, “YES!”, “ “, “YES!” registered by PRGR (the Seoul Central District Court of Korea, 2010.11)
- Preliminary injunction against infringement of trademark registered by NICKLAUS COMPANIES, LLC (the Seoul High Court of Korea, 2009.7)

- Preliminary injunction against use of trade name “DAESUNG HOLDINGS CO., LTD.” against DAESUNG GROUP HOLDINGS CO., LTD. (the Seoul High Court of Korea, 2010.11)

- Seoul National University, College of Law (LL.B.)
- Seoul National University, Graduate School of Law (LL.M.)

- Judicial Research and Training Institute of the Supreme

[Court of Korea]
- Judge Advocate Officer, Republic of Korea Navy
- Judge, Seoul Civil District Court
- Judge, Seoul Criminal District Court
- Judge, Jeju District Court
- Judge, Seoul Central District Court-Northern Branch
- Deputy Director General for Litigations, National Court

[Administration]
- Judge, Seoul High Court
- Judge, Patent Court
- Presiding Judge, Suwon District Court
- Presiding Judge, Seoul Central District Court
- Presiding Judge, Patent Court
- Chief Presiding Judge, Patent Court
- Presiding Judge, Seoul High Court
- Chairman, Korea Association for Informedia Law
- Chief Presiding Judge for Civil Division, Seoul Central

[District Court]
- Chief Judge, Chuncheon District Court
- Chairperson, Gangwon-do Election Commission
- Panelist, Internet Address Dispute Resolution Committee
- Chairman, Internet Address Dispute Resolution Committee
- Editor (in IP Law and ICT) for Thomas Reuters LAWnB Onju
- Presiding Judge, Seoul High Court
- Chairman, Korea Communications Commission

- Patent law commentary (PY Book, 2010) : Chapter 9 “Litigation”
- On the product by process claim
- Requirements for application of the Doctrine of Equivalents
- Issues concerning interpretation of the scope of patent claim
- Patent requirements for selection invention
- Inventions determining objects by characteristics or properties
- Practices of intellectual property disputes settlement
- Patent infringement lawsuits and patent invalidation
- Rejected cases of patent infringement on Business Method Patent (BM Patent)
- Applicability of “abuse of right” for injunction based on apparently defective patents
- Influence of confirmed decision of a trial for correction on the invalidation trial
- Prosecution history estoppel
- Issues on the Trademark Law on the internet
- On acquired distinctiveness
- On domain names and trademark right
- Recent trend of precedents on domain names
- Controversial Issues on Unfair Competition practices
- Recent precedents on the protection of configuration of goods and design of containers and packaging

82-2-3016-5040
prof@ajupatent.com