Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025

Showing 1–9 of 9 inventors

Rank Inventor Primary Company Patents
1 Masao Namai Sawafuji Electric Co. 2
2 Naoki Tsuzurano Sanyo Electric Co. 1
2 Mitsunobu Aoyama Maruo Calcium Co. 1
2 Noriyoshi Yamada Nippon Shokubai Co. 1
2 Fukuji Yoshida Sanyo Electric Co. 1
2 Shingo Kikukawa Chisso 1
2 Daikichirou Motegi Sawafuji Electric Co. 1
2 Ryuji Rouyama 1
2 Tomoyuki Nihei Casio Computer Co. 1