.S. Patent Office's data base to identify when and where changes in inventive output have occurred. The model assumes a firm …

listed companies, more particularly, to find out whether China patent's claim impacted on China listed company's stock return … rate or not. It was because the claim played the most important role in a patent which being a key driving force for modern … business. Design/methodology/approach: This research used a company integrated China patent database in which all subsidiary …