Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025

Showing 1–10 of 10 inventors

Rank Inventor Primary Company Patents
1 Masahiro Yoshikawa 4
2 Ichiro Yamashita Sumitomo Electric Industries 3
3 Atsumi Araki Komatsu 1
3 Norihisa Dan Ciba Specialty Chemicals 1
3 Takuo Ikeda Chisso 1
3 Yuji Mototani Sumitomo Electric Industries 1
3 Rihito Shoji Sumitomo Electric Industries 1
3 Tomiharu Hosaka Sumitomo Electric Industries 1
3 Kazunobu Oketani Sanyo Electric Co. 1
3 Kaoru Iwakuni Sumitomo Electric Industries 1