Empirical research on intellectual property protection by criminal procedure Empirical study on intellectual property protection of cultural recreation industry Research on intellectual property protection in cyberspace 并列题名：Research on intellectual property protection in cyberspace 并列题名：Empirical study on intellectual property protection of cultural recreation industry Sui generis intellectual property protection for folklore 并列题名：Sui generis intellectual property protection for folklore Research on intellectual property in international trade 并列题名：Research on intellectual property in international trade Research on intellectual property transaction mechanisms of China