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 …

Patent renewal studies reveal a highly rightward-skewed distribution of patent values. Our approach elicits valuations …

&D expenditures and patents. Our data allow a detailed analysis of the firm size distribution of R&D and patent applications at … different patent offices. It is shown that the share of R&D performing firms is strictly increasing with firm size. The share of … patents in more than one country. The home patent office seems to be especially important for small firms. Using various count …