Research on legal system of patent transaction 并列题名:Research on legal system of patent transaction Research on legal system of punishment for discredit Research on the legal system of reorganization Reseach on legal system of mut ual-benefit corporation Research on the legal system of cultivated land protection Research on legal system of futures and options markets Research on the legal system of public interest litigation Research on legal system of international climate finance Research on the legal system of transgenic biosafety