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This paper delves into the proliferation of non-practicing entities (NPEs), a hot topic in academia and public policy, especially in the United States. The common belief is that Europe is less exposed to NPEs due to a robust patent system, higher enforcement costs, and smaller damage awards. Yet, using a new database of NPE patent applications at the European Patent Office (EPO), the study uncovers that NPEs activity in Europe is arising: they own nearly 20,000 EPO patents, primarily in Electrical Engineering. Moreover, we contribute the literature investigating the heterogeneity of the NPE business model and its relationship with the characteristics and use of the patents they target. Our econometric analysis provides threefold original evidence. First, NPEs with higher propensity for litigation (i.e. "Litigation" NPEs) acquire patents with higher infringement risk but similar technological quality than practicing entities. Second, patent aggregators (i.e. "Portfolio" NPEs) and technology companies (i.e. "Technology" NPEs) acquire higher-quality patents compared to those acquired by practicing entities. Third, patent acquisitions by "Litigation" NPEs and "Portfolio" NPEs reduce the subsequent use of protected technologies. [ABSTRACT FROM AUTHOR]

Over the past 20 years, European universities have increased their propensity to retain title of their faculty's inventions, but evidence on the value of such patents is at best mixed. Based on a longitudinal sample of Italian academic patents (patents over faculty's inventions), assigned either to universities or firms, we find that the lower value of university-owned patents, versus firm-owned ones, is owing to lower Technological Importance of the inventions and less effective Exploitation of the related patents. Lack of experience in managing patented inventions explains our results for Technological Importance, but not for Exploitation. Both are unrelated to the presence of a technology transfer office. Our study suggests caution in pushing universities to expand their patent portfolios and in using university-owned patents as indicators of technology-transfer activities. [ABSTRACT FROM AUTHOR]

Many patent assertion entities (PAEs) hide behind multiple unknown subsidiaries or shell companies with obscure ownership. Meanwhile, the United States Patent and Trademark Office (USPTO), like many other patent offices, does not impose a strict time period for recording the change of ownership of a patent, allowing the holder to gain an advantage by controlling the timing of its ownership disclosure. In this paper, we study to which extent PAEs delay the recording of the U.S. patent reassignments of patents that they will subsequently use in infringement patent lawsuits. On average, PAEs notify the change of ownership more quickly than producing firms, but this is not the case for the patents that they will litigate relatively far in time. In particular, the correlation between the recording lag of the patent transaction and the litigation spell is higher when the patent acquirer is a PAE (than when it is a producing firm) or when the acquirer will litigate the patent in the Eastern District of Texas, famously home to opportunistic litigations. Finally, we find that transactions involving unknown subsidiaries of PAEs are recorded at the USPTO significantly later than those involving PAE parent companies or their known subsidiaries. [ABSTRACT FROM AUTHOR]

This paper explores the importance of early-career characteristics of academic inventors and how they affect their patenting activity. Using a novel dataset on 555 UK academic inventors, we find that the quality of the first invention is the best predictor for subsequent participation in the patenting process. We further find evidence for a positive training effect whereby researchers who were trained at universities that had already established commercialisation units patent more. In addition, researchers who gained their first patenting experience in industry are able to benefit from stronger knowledge flows and receive more citations than their purely academic peers. [ABSTRACT FROM PUBLISHER]