Legal Basis: Interpretation of the Supreme People's Court on Several Issues Concerning the Application of Laws in the Trial of Patent Infringement Disputes (II) Article 5 When determining the scope of protection of patent rights, the technical features recorded in the preface and features of independent claims, as well as the parts that quote and limit subordinate claims, have restrictive effect. Article 6 The people's court may use other patents related to the patent involved and their patent examination documents, effective patent authorization and confirmation judgment documents to explain the patent claims involved.