The Section 337 investigation is one of the United States’ most potent legal weapons for policing intellectual property disputes. Conducted by the US International Trade Commission (USITC), they can lead to the total exclusion of a product from the American market.And the tool is often used to target China: more than 40 per cent of the Section 337 investigations completed in 2024 involved a Chinese company, according to USITC data.In September, the commission launched a probe into smart...