Mueller, Simon C.; Sandner, Philipp G.; Welpe, Isabell M. - In: Applied Energy 137 (2015) C, pp. 537-544
. Looking at patent applications as a metric allows us to determine whether the necessary technological progress is indeed … paper contributes to the literature with a compilation of technological classes related to important battery types in the … novel Cooperative Patent Classification (CPC), which can be used to identify relevant patent applications of the competing …
