“万艾可”专利无效案的启示

What Can Be Learned from the Case of Viagra Patent Invalidation

万艾可，英文名为Viagra，在中国俗称“伟哥”，是世界知名制药巨头辉瑞公司的产品。作为治疗男性阳痿的特效药物，万艾可一经推出便轰动一时，受到全球消费者的热烈追捧和业界的广泛关注。2005年，万艾可的全球销售额高达16亿美元，占据全球同类药物市场约60％的份额。

Viagra, a product of the Pfizer Ireland Pharmaceuticals （Pfizer）, a world renounced pharmaceutical manufacturer, is a drug having a special effect of treatment of erectile dysfunction （ED）. Since it was put on the market, it has been well received by global consumers and drawing extensive attention from the industry. In 2005, the global annual turnover from the sale of Viagra reached $1.6 billion,1 taking up about60% market share of the pharmaceutical of the class in the world？