7. Conclusions
Adding to the debate on open innovation, our results suggest several important findings from decomposing the innovation processes into inventing and commercializing. First, we find that, in the US, just over 10% of triadic patents have external co-inventors. These results suggest that co-assignee data are not a good predictor of cooperative inventive activity and understate the rates of open innovation. The results also show that most co-invention is with vertically related firms (suppliers or customers/users), and coinvention with competitors is very rare.We also find that about 23% of triadic patent inventions involve external (non-co-inventor) collaborators (with 27% involving any external collaborators, spanning co-inventors and non-co-inventors).