Patent trolling against innovation: status, trends, threats

In this paper the economic and legal analysis of the phenomenon of patent trolling. It is shown that the main financial costs caused by the actions of patent trolls, are small and mediumsized innovative companies. Patent trolls undermine the principles of patent law, damage, limit research, hinder innovation, entrepreneurial initiative. The Act also imposes new restrictions on the trolls – they will not be able to file lawsuits against several companies at once if there is no proof of collusion. The new principle of "one action - one respondent" should reduce the number of firms, brought to court.