# Identifying technological sub-trajectories in patent data: the case of photovoltaics

> Research article (Economics of Innovation and New Technology, 2018) · cited 19× · AI/ML

**Wikidata**: [openalex:W2899634476](https://www.wikidata.org/wiki/openalex:W2899634476)  
**Source**: https://4ort.xyz/entity/identifying-technological-sub-trajectories-in-patent-data-the-case-of-photovoltaics