问题专利 （ questionable patents ）、垃圾专利、沉睡专利（sleeping patents）的存在严重阻碍了新技 术的产业化和新产品的开发。
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An analysis of questionable patents 问题专利探析
To be sure, we are plagued by a new species of patent litigant these days, the so-called patent troll, who buys up questionable patents in hopes of extracting payments from deep-pocketed companies eager to avoid the expense of litigation.
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