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辉瑞在万艾可(又称伟哥)专利权上和中国企业的交锋,已经演变成了一场旷日持久的战争。中国企业先是赢了第一回合——2004年7月,国家知识产权复审委取消了万艾可在中国
The clash between Pfizer and Chinese enterprises in Viagra (also known as Viagra) has evolved into a protracted war. Chinese enterprises first won the first round - July 2004, the State Intellectual Property Review Commission canceled Viagra in China