Professional Practice
William’s practice covers all areas of intellectual property and technology litigation, with particular experience in trade mark and copyright disputes. William has been ranked by Legal 500 (2022 to 2026) as a Leading Junior and by Chambers and Partners Greater China Region (2026) as Up and Coming for Intellectual Property.
William accepts appointment to act as arbitrator. He has been appointed as the presiding arbitrator in an IP dispute concerning online gaming licenses and has acted for parties in HKIAC-administered arbitrations.
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High Court
- German Pool Group Co Ltd & Ors v Dyson Technology Ltd & Another HCIP 53/2019 (inquiries of damages on cross-undertaking and groundless threats of patent infringement) (led by Andrew Liao S.C.); application for specific discovery [2025] HKCFI 6475
- Cartier International AG & Ors v Dynasty Jewelry (Hong Kong) Ltd [2025] HKCA 818 (Court of Appeal); [2023] HKCA 1002 (Court of Appeal); [2021] HKCFI 1005: contempt of court, breach of Island Records orders (with Philips Wong)
- Wong To Yick Wood Lock Ointment Ltd v Sun Ascent Development Ltd [2024] HKCFI 2706: resist an application to set aside an ex parte order granting leave to institute committal proceedings for alleged breach of Island Records orders on ground of material non-disclosure (led by John Yan SC)
- Wong To Yick Wood Lock Ointment Ltd v Imperial Charity Hall Medicines Ltd & Anor [2024] HKCFI 1867: contempt of court, breach of Island Records orders
- Wong To Yick Wood Lock Ointment Ltd v Yue Hwa Cosmetic Ltd & Anor [2024] HKCFI 1868: contempt of court, breach of Island Records orders
- Monster Energy Company v 洪嘉珮 HCIP 5/2019, [2020] HKCFI 561: appeal against a decision of the Registrar of Trade Marks
Trade Marks Registry & Copyright Tribunal
- Opposition of trade mark [2025] HKTMR 43
- Opposition of trade mark “Medifoam” [2025] HKTMR 20
- Opposition of trade mark “B.Duck” [2025] HKTMR 10
- Revocation of trade mark “嶺南東方酒店” [2025] HKTMR 7
- Opposition of trade mark “Off & Device” [2025] HKTMR 1
- Opposition of trade mark “grMail” [2024] HKTMR 52
- Opposition of trade mark “Atwo illuma” [2024] HKTMR 8
- Opposition of trade mark “CVA” [2023] HKTMR 66
- Opposition of trade mark “CVA” [2023] HKTMR 65
- Opposition of trade mark “Buffy” [2023] HKTMR 61
- Opposition of trade mark “VIVO” [2023] HKTMR 40
- Opposition of trade mark “CHALI” [2023] HKTMR 34
- Opposition of trade mark “ATWO” [2023] HKTMR 30
- Opposition of trade mark “a2 Store” [2023] HKTMR 29
- Opposition of trade mark “OT Tango & Device” [2023] HKTMR 24
- Revocation of trade mark “JAGUAR” [2023] HKTMR 4
- Neway Music Ltd v Hong Kong Karaoke Licensing Ltd CT 2/2010, 23 December 2019: 37 days trial before the Copyright Tribunal on the reasonableness of licence fees charged under a karaoke music videos licensing scheme (led by Andrew Liao SC and with Norman Hui)
Civil & Commercial
- Shun Pong Ltd v Chan Koo Kai Felix and others [2025] HKCFI 4540: beneficial ownership of land, proprietary & promissory estoppel
- HK88 Enterprises Limited v Su Yuan-Yu [2024] HKCFI 1678: beneficial ownership of land, constructive and resulting trust
Arbitration
- Chair arbitrator in an IP dispute concerning online gaming licenses (HKIAC arbitration)
- Acted as counsel in a dispute concerning sale and purchase of future receivables (HKIAC arbitration)
Competition
- Taching Petroleum Co Ltd v Meyer Aluminium Ltd [2021] HKCT 2; [2021] HKCFI 3028 Counterclaim for damages arising from price fixing in contravention of first conduct rule. With Kenneth Lee and Nana Lui
- Taching Petroleum Co Ltd v Meyer Aluminium Ltd [2021] HKCA 294 (Court of Appeal), appeal against Competition Tribunal’s decision in refusing to grant leave to amend Points of Defence and refusing leave to adduce expert evidence. With Kenneth Lee and Nana Lui
- Advised an undertaking on matters involving investigation brought by the Competition Commission
2013 PCLL (Chinese University of Hong Kong)
2010 Bachelor of Laws and Bachelor of International Studies (University of Sydney)
2005 Saint Ignatius College, Riverview (Sydney)
Part-time Lecturer (Non-Clinical), Department of Professional Legal Education, The University of Hong Kong (2020-present)
Committee Member, Committee of Intellectual Property of the Hong Kong Bar Association (2019-present)
Committee Member, Standing Committee of Continuing Education of the Hong Kong Bar Association (2022-present)
“Hong Kong: Competition Litigation” The Legal 500 Country Comparative Guides (August 2023)
“Metaverse, Trademarks, Competition” 2022 (CPD Seminar)
“Competition Law with Industry Focus on Construction Materials and Related Sectors” November 2020
“Neway Music Ltd v Hong Kong Karaoke Licensing Alliance Limited: A Landmark Decision by the Copyright Tribunal” Hong Kong Lawyer, 11 June 2020
“Competition Law as a Defence in Civil Actions” 2019 (CPD Seminar)
“Introduction on Competition Ordinance Cap. 619” 2017 (CPD Seminar)