which German patent renewal fees were paid to full-term expiration in 1995. A search of subsequent U.S. and German patents … allowed to expire before their full term. The higher an invention?s economic value estimate was, the more the relevant patent …

We explore the tail of patented invention value distributions by using value estimates obtained directly from patent …

This paper investigates how patent applications and grants held by new ventures improve their ability to attract … British biotechnology companies we have identified all patents filed at the European Patent Office (EPO). Applying hazard rate … analysis, we find that in the presence of patent applications, VC financing occurs earlier. Our results also show that VCs pay …

This paper investigates how patent applications and grants held by new ventures improve their ability to attract … British biotechnology companies we have identified all patents filed at the European Patent Office (EPO). Applying hazard rate … analysis, we find that in the presence of patent applications, VC financing occurs earlier. Our results also show that VCs pay …

We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of … patenting in complex and discrete technologies. The model captures how competition for patent portfolios and complementarity of … patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological …

Post-grant validity challenges at patent offices rely on the private initiative of third parties to correct mistakes … made by patent offices. We hypothesize that incentives to bring post-grant validity challenges are reduced when many firms … benefit from revocation of a patent and when firms are caught up in patent thickets. Using data on opposition against patents …

provide external finance to innovative firms based on the firms' patent portfolios. Patents have been used as collateral or as … assets assembled in patent funds seeking to commercialize the patent rights. Patent auctions are indicative of a nascent … and the design of patent systems. …