Patent trolls

The US Supreme Court on Monday gave technology companies a powerful new tool to fight off lawsuits brought by so-called \"patent trolls\". Monday\'s ruling, which involved the online auction giant Ebay (EBAY: Charts, News, Offers), could profoundly change the balance of power between companies that use... 顯示更多 The US Supreme Court on Monday gave technology companies a powerful new tool to fight off lawsuits brought by so-called \"patent trolls\". Monday\'s ruling, which involved the online auction giant Ebay (EBAY: Charts, News, Offers), could profoundly change the balance of power between companies that use patents primarily for litigation - sometimes called \"patent trolls\" - and high-tech companies that make products based on thousands of different bits of patented technology.

本文中的patent trolls指的是什麼呢?
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