"Patent Troll" is new to our country. It did not enter our academic circles of the research scope until recent years. Patent trolls originated in the United States. It indicates those who don’t engage in producing and make profit by a large number of patent prosecution activities for tort damages or patent licensing fees. Patent troll is a dissimilation under the patent system. Patent trolls’ action is completely legal, yet against the original idear of setting the patent system.The article is divided into the following four parts:The first part introduces the concept, features and background of patent trolls. The emergence of patent trollis the result of the contradictions in the patent system itself, the patent policy of US and other factors. The second part analyzes the activities of patent trolls. Then comes discussion of the negative effects of patent trolls. The third part discusses different stragegies dealing with patent trolls of US, South Korea and India. The fourth part, using the experience of other coutries, gives advice of dealing with patent trolls in China forward from the level of country and the level ov enterprise. |