Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025

Showing 1–48 of 48 inventors

Rank Inventor Primary Company Patents
1 Shigeru Narakino Sumitomo Electric Industries 14
2 Akira Hoashi Fujitsu Limited 12
3 Takanori Kuroki Kuroki Kogyosho Co. 7
#4 Kotohiko Sekoguchi Fujikin Incorporated 6
#5 Michihiko Nakagaki Rinascimetalli 5
#6 Tadao Nozawa Nippon Steel 4
#6 Mitsuyoshi Nakano Yaskawa Electric 4
#6 Haruhisa Fukano Fujitsu Limited 4
#6 Takayoshi Takahira Aisin Kako Kabushiki Kaisha 4
#10 Motoki Numata Mitsubishi Chemical 3
#10 Tanemasa Asano Fuji Electric Co. 3
#10 Shunichiro Taniguchi Takara Shuzo Co. 3
#10 Katsumi Eguchi Yoshikawa Kogyo Co. 3
#10 Kazutoshi Ogata Kabushiki Kaisha Toshiba 3
#15 Mineo Shimizu China Steel 2
#15 Yasumi Shimazaki Nippon Steel 2
#15 Tomoko ARITA Aisin Aw Co. 2
#15 Nobuaki MINOSHIMA Fuji 2
#15 Nobuhiro Kyura 2
#20 Masahiko Kashimoto Sumitomo Electric Industries 1
#20 Hiroyuki Ijima Toyo Boseki Kabushiki Kaisha 1
#20 Akinori Ushijima Toyoda Gosei Co. 1
#20 Kiyotoshi Sakai 1
#20 Morihei Ooho 1
#20 Seizo Yokota 1
#20 Mizuo Sakakihara Nippon Steel 1
#20 Yasutaka Hirao Dainichi-Nippon Cables 1
#20 Mitsunori Yokooji Yaskawa Electric Mfg. Co. 1
#20 Toshiaki Nogami Toto 1
#20 Kenichi Tatsuguchi Toyota 1
#20 Mitsutoshi Fujimura 1
#20 Keizou Shin Sumitomo Electric Industries 1
#20 Toshiyuki Kokido 1
#20 Mitsuo Murata 1
#20 Rumiko Kamimura New Oji Paper Co 1
#20 Hachiro Otsuyama 1
#20 Kenichi Toraishi 1
#20 Kazunao Hanada Mitsubishi Kasei 1
#20 Muraoka Kyouji Mitsui Petrochemical Industries 1
#20 Tomoyoshi Kawanami Nissei Asb Machine Co. 1
#20 Ikuo Ikeda Sagami Chemical Research Center 1
#20 Takemoto Onaka Seibu Electric & Machinery Co. 1
#20 Motoyuki Inoue Noritake Co., Limited 1
#20 Yoshikazu Maki Kawasaki 1
#20 Ryoichi Egasira Sumitomo Electric Industries 1
#20 Spencer P. Warn 1
#20 Koji Sugishita Sumitomo Electric Industries 1
#20 Haruki Kabashima Toyota 1