We analyse the determinants of opposition to biotechnology and pharmaceutical patents granted by the European Patent … the patents are attacked in opposition proceedings. Using citation and patent family indicators we show that valuable … patents are more likely to be attacked, and that opposition is particularly frequent in areas with strong cumulative patent …

private economic value of patents. The estimated mean of our patent value distribution is higher than 3 million Euros, the …

approximating those of the patented invention. This paper focuses on the full-term patents of the application year 1977 held by West …

venture capital (VC) financing. We argue that investors are faced with considerable uncer-tainty and therefore rely on patents … British biotechnology companies we have identified all patents filed at the European Patent Office (EPO). Applying hazard rate … attention to patent quality, financing those ventures faster which later turn out to have high-quality patents. Patent …

benefit from revocation of a patent and when firms are caught up in patent thickets. Using data on opposition against patents … revocations. Moreover, in fields with a large number of mutually blocking patents the incidence of opposition is sharply reduced …

information related to the patent’s economic and technical relevance, EPO capacity and workload as well as novel citation measures …

patents granted by the EPO are estimated to increase by 29%. …

holders. The paper focuses on those full-term German patents of the application year 1977 which were held by West German and U ….S. residents. The most valuable patents in our data account for a large fraction of the cumulative value over all observations …

venture capital (VC) financing. We argue that investors are faced with considerable uncertainty and therefore rely on patents … British biotechnology companies we have identified all patents filed at the European Patent Office (EPO). Applying hazard rate … attention to patent quality, financing those ventures faster which later turn out to have high-quality patents. Patent …