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 … simple patent counts as a measure of innovative contribution by acquiring data on citation frequencies and the number of …

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 …

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 …

The existing literature identifies patent thickets indirectly. In this paper we propose a novel measure based on patent … citations which allows us to measure the density of patent thickets directly. We discuss the algorithm which generates the … by patent thickets. …

We analyze the duration of the patent examination process at the European Patent Office (EPO). Our data contain … information related to the patent's economic and technical relevance, EPO capacity and workload as well as novel citation measures … the patent grant by the examiner or an actual patent grant. Highly cited applications are approved faster by the EPO than …

The existing literature identifies patent thickets indirectly. In this paper we propose a novel measure based on patent … citations which allows us to measure the density of patent thickets directly. We discuss the algorithm which generates the … by patent thickets …