“…In this process, bibliometric analysis, such as co-word, co-citation, co-authorship, and journal subject category co-classification analysis, has been widely conducted using scientific article data (Leydesdorff, 2007;Porter & Rafols, 2009;Porter, Cohen, Roessner, & Perreault, 2007;Schummer, 2004;Sun, Ding, & Lin, 2016;Zhang, Zhang, Zhu, & Lu, 2017;Zitt, Ramanana-Rahary, & Bassecoulard, 2005). Research on market-level convergence has analyzed product specifications using press release data (Lee, Lee, & Cho, 2009;Han, Chung, & Sohn, 2009). In this research, we focused on technological and industrial convergence using patent data.…”