Dr. Jacqueline Lui, President of Eagle IP Group, gave a talk titled “Are Patents Enforceable in China?” at The 9th IP Seminar.
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The Secret Prior Art Trap: A Case Study on Conflicting Applications in China
13 November 2025In patent prosecution, the concept of a "conflicting application" or “secret prior art” plays a critical role in determining the patentability of an invention. This article explores the framework for assessing conflicting applications under Chinese patent law, with a comparative perspective on the approaches adopted in the United States. Case Background: The Image Encoding Dispute […]
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Markush claims in China - what can be arbitrarily deleted during invalidation?
4 December 2018Since 2010, the China Patent Re-examination Board (PRB) has published the top 10 patent invalidation cases of the year in April of each year. The selection criteria are high social concern, significant impact on the related industry, or involve difficult legal issues and important examination criteria. Below is one of the top 10 cases that […]
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How a Secondhand Ground Brush Wiped Away a Chinese Patent
4 December 2024A Chinese robot vacuum company digs up “hidden evidence” to successfully invalidate a patent owned by its biggest competitor. Highlights Background With the growth of online shopping, it is easier than ever to provide evidence of a sale when the product is still being sold on the market. But what if the product is no […]
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Narrow Claim Scope of a Chinese Utility Model Patent Fuels Design-Arounds by Failing to Curb Competing Products:
28 October 2020Learning from a 2019 China’s Top 50 Representative IP Case The number of patent applications in China is now the highest in the world, with more than half the applications filed as utility model applications (UMs). For example, there were more than 2 million UMs filed in 2018 alone (for the difference between a utility […]
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