This book summarizes around 200 most recent patent administrative litigation cases concluded by the Intellectual Property Court of the Supreme People's Court of China in the form of restatements. It discusses the similarities and differences in claim construction, full disclosure, definiteness of claims, nature of reexamination and ex officio review in the context of recent patent administrative litigation cases. It is conducive to the implementation of unified review standards and achievement of a fair trial by using typical cases as guidance in the application of patent law. This book could be used as a reference book for judges, researchers, and practitioners.