Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025

Showing 1–6 of 6 inventors

Rank Inventor Primary Company Patents
1 Kiyoshi Ishikawa Tokyo Ohka Kogyo Co. 6
2 Yoshihiro Ohba Telcordia Technologies 4
3 Kenichi Taniuchi Toshiba America Research 3
3 Masahiro Yamashita Mitsui Chemicals 3
#5 Makoto Sekiya Minolta 2
#6 Yasuhiro Katsube Kabushiki Kaisha Toshiba 1

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