The real cost of "patent trolls"
研究了专利流氓对美国经济的影响，提供了专利诉讼成本、研发投资减少和风险投资下降的统计数据。
The article discusses research findings on the effects of patent trolling on the U.S. economy and presents statistics on the costs of patent litigation, reduced investment in research and development, and declines in venture investing.