Profile

Ms. Ma On Ki has a broad civil and criminal advisory and litigation practice, with a strong focus on intellectual property matters.

Prior to joining the Bar, Ms. Ma was an Intellectual Property Examiner of the Intellectual Property Department of the HKSAR Government from 2012 to 2015. She is currently a member of the Committee on Intellectual Property of the Hong Kong Bar Association. She regularly appears for parties in intellectual property cases and advises on all aspects of intellectual property law. Ms. Ma was recognized as a Rising Star in Intellectual Property in The Legal 500 Guide to the Hong Kong Bar in both 2021 and 2022 and has been described as “… punches well above her weight and can be counted on for any IP instruction” (The Legal 500 Guide to the Hong Kong Bar (2021)).

Ms. Ma also has wide experience in other practice areas, including criminal litigation, statutory disciplinary proceedings and general civil practice. For general civil practice, Ms. Ma represented clients for causes of action involving tort, contract, land, commercial, and various company matters, etc. She has also sat as a Deputy Magistrate and has acted as counsel on fiat.

Ms. Ma accepts instructions in all areas of work and is capable of providing written submissions and conducting hearings in both English and Chinese.

Contact
Email: [email protected]
Tel: (+852) 2524 8830
Fax: (+852) 2868 3896
Address: 128, 12/F, New Henry House, 10 Ice House Street, Central

Secretary
Name: Elvina Chow
Email: [email protected]

Education

2014 The Postgraduate Certificate in Laws (PCLL), The University of Hong Kong

2012 Bachelor of Laws (LLB), The University of Hong Kong

2010 Bachelor of Social Sciences (Government and Laws), The University of Hong Kong

Appointments and Public Office

Member, Committee on Intellectual Property, Hong Kong Bar Association (since Mar 2017)

Deputy Magistrate, Magistrates’ Courts, HKSAR (1st appointment in 2022)

Adjudicator, Obscene Articles Tribunal, HKSAR (Sep 2013 to Sep 2019)

Intellectual Property Examiner, Intellectual Property Department, HKSAR Government (2012 to 2015)

Directory Rankings

Ranked as Rising Star in Intellectual Property in The Legal 500 Guide to the Hong Kong Bar (2021 & 2022)

Publications – Lectures – Talks

“A Multi-faceted Approach to Managing Modern IP – Enforcement of IP Rights”, Speaker at Business of IP Asia Forum 2023 (Dec 2023)

“Expert evidence for trademark owner in criminal proceedings relating to forged trademarks”, Guest Speaker at seminar held by The Hong Kong Institute of Trade Mark Practitioners (Mar 2021)

“Essentials of Contract Law”, Visiting Lecturer of the Hong Kong Legal Training Institute (Aug 2020)

Language

Cantonese, English, Mandarin

Selected Cases

Intellectual Property:

• Hongkong Yeewotong Venturepharm Technology Groups Ltd v China Beijing Tong Ren Tang Group Co., Ltd. & Anor [2025] HKCFI 2977, HCIP 3/2024 (acting for respondents (opponents), successfully resisted the appellant (applicant)’s applications for leave to appeal against the decision of the Trade Marks Registry out of time and adduce new evidence on appeal)

 

• Buildtech Enterprise International Ltd & Ors v OK Construction Materials (Supply) Co Ltd [2025] HKCFI 1133, HCIP 14/2021 (acting for plaintiffs at trial, successfully invalidated the defendant’s registered trade mark)(led by Mr. John Yan SC)

 

• Megahong Pharmaceutical Company (a firm) v 醫藥易有限公司 [2023] 3 HKC 469, [2023] HKCFI 930, HCIP 83/2021 (acting for appellant (opponent), appeal against decision of the Trade Marks Registry dismissing opposition allowed)

 

• 樂氏同仁藥業科技集團有限公司 v 中國北京同仁堂(集團)有限責任公司 [2021] HKCFI 1025, HCIP 62&63/2020 (acting for respondent (opponent) in an appeal against the decision of the Trade Marks Registry, successfully resisted the appellant’s application for adducing new evidence on appeal)

 

• Duracell U.S. Operations, Inc. v Matsushima Electric (H.K.) Co Ltd & Ors [2018] HKCFI 347, HCA 1747/2017 (acting for defendants, successfully obtained relief from sanction and resisted plaintiff’s application for default judgment and interim payment) (led by Mr. John Yan SC)

 

• Giorgio Armani S.p.A. v Tong Mo Ching [2023] HKTMR 36 (acting for applicant, successfully resisted opposition)(led by Mr. John Yan SC)

 

• Jaguar Land Rover Limited v Jaguar Collections Ptd Ltd [2023] HKTMR 4 (acting for successful applicant for revocation with cross-examination of witnesses)

 

• BioMérieux v Biomechanics Limited [2022] HKTMR 17 (acting for applicant, successfully resisted opposition)

 

• Hoe Hin Pak Fah Yeow Manufactory Limited v Cheung, Yin Chuen Trading as New York USA Yee Hing (Pak Fow Oil) Mfy [2020] HKTMR 50 (acting for successful opponent)

 

• Perfect Flow Assets v Z Publishing Co., Limited [2018] HKTMR 30 (acting for successful opponent)

 

• Babyzen v American Summer Baby Products Group Co., Limited [2017] HKTMR 87, [2017] HKTMR 88 (acting for successful opponent)

 

General Civil:

• Lau Kin Man Edward v Tsoi Ting Chui John & Anor [2024] HKDC 2109, DCCJ 4874/2021 (acting for defendants at trial, successfully defended plaintiff’s nuisance claims (water seepage) and successfully challenged expert evidence)

 

• Ten Plus Ltd (In liquidation) v Donovan Miu Wah Mira (also known as Li Miu Wah Mira) & Ors [2023] HKCFI 3227, HCA 1573/2013 (acting for 4th to 6th defendants at trial, successfully defended plaintiff’s claims for, inter alia, conspiracy to defraud/ injure, dishonest assistance of breach of fiduciary duties and knowing receipt, and successfully challenged expert evidence)

 

• Tang Wai Keung v Wong Shui Fong & Anor [2023] HKCFI 967, HCA 1301/2021 (acting for 1st defendant, successfully resisted plaintiff’s appeal against decision striking out statement of claim and dismissing action)

 

• Tang Kwong Hung v Kwan Chi Kai, the administrator of the Estate of Tang Ki Chee [2022] HKCFI 366, HCMP 915/2018 (acting for 1st plaintiff at trial, successfully obtained an order to, inter alia, remove defendant as administer of the estate of the deceased)

 

• Tang Wai Keung v Wong Shui Fong & Anor [2021] HKCFI 3627, HCA 1301/2021 (acting for 1st defendant, successfully resisted plaintiff’s application for interlocutory injunction)

 

• Chen Yuet Wa Eva v Chan Ho Hei [2021] HKDC 665, DCCJ 5801/2020 (acting for plaintiff, successfully obtained default judgment with declaration)

 

Others:

• Acting for plaintiffs in various cases and successfully obtained interlocutory injunctions against defendants.

 

• Acting for defendant in a criminal trial on offences relating to forged trade marks under the Trade Descriptions Ordinance (Cap. 362), successfully challenged expert evidence etc., defendant acquitted (led by Mr. Danny Ng).

 

• Acting for a Chinese medicine practitioner at an inquiry conducted by the Chinese Medicine Practitioners Board of the Chinese Medicine Council of Hong Kong, application of “no case to answer” to the charge of professional misconduct granted.

 

• Acting for applicants in applications relating to alleged mentally incapacitated persons within the meaning of Mental Health Ordinance (Cap. 136) with relief successfully obtained.