Og, Joo Young; Pawelec, Krzysztof; Kim, Byung-Keun; … - In: Journal of open innovation : technology, market, and … 6 (2020) 1/16, pp. 1-16
ex post patent value indicators are incorporated. A patent renewal model is tested using a large set of Pharmaceutical … patents granted by the European Patent Office between 1996 and 2009. We test five ex ante indicators and single ex post … indicator including family size, patent backward citations, backward references to non-patent literature, number of claims …