Research on the theory of the intangible property rights 并列题名:Research on the theory of the intangible property rights Research on the nature of the firm property rights 并列题名:Research on the nature of the firm property rights Research on strategy of intellectual property rights research on the reform of rural collective property rights system Research on the theory and practice of China's property rights market Research on the legal issues of property rights research on the history of Chinese modern design 并列题名:Research on strategy of intellectual property rights