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How is non-obviousness in improvement drug invention patents assessed?

Wu Xiaoping and Hu Honghui of Wanhuida examine the methodology employed by the Patent Reexamination Board to determine non-obviousness of an improvement invention

Drug invention patents are dedicated to protecting multiple types of inventions, including compounds, crystal forms, dosage forms, preparation methods and uses. Due to the high entry threshold, the research and development of drugs can be a pricey and lengthy process...

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