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eOASIS is Rajah & Tann Singapore LLP's legal information website for clients, containing business and legal information prepared from a practitioner's viewpoint. It has four different modules, updated regularly, and materials range from commentaries on the latest legal developments to key legal and business information.

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In 2017, the Honourable Justice George Wei ruled in a landmark decision that the High Court in Singapore had no original jurisdiction to hear patent revocation proceedings, even if such proceedings were brought by way of a counterclaim in infringement proceedings (Sun Electric Pte Ltd v Sunseap Group Pte Ltd and ors [2017] SGHC 232). This decision represented a major departure from existing case law and legal practice. However, in Sunseap Group Pte Ltd and ors v Sun Electric Pte Ltd [2019] SGCA 4, the Court of Appeal reversed the High Court's decision and found in favour of the Defendants. In doing so, the Court of Appeal also laid down some important principles in relation to how a patent revocation counterclaim should be pleaded, and drew a distinction between applications to revoke a patent by way of a counterclaim to infringement proceedings, and by way of standalone pre-emptive suits. Rajah & Tann Singapore LLP's Lau Kok Keng, Nicholas Lauw and Leow Jiamin acted for the successful Defendants/Appellants in the appeal. 


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