Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Mito, JP ranks #909 worldwide for total patents filed all time, with 3,655 patents from 606 inventors. Leading employers of inventors based in Mito, JP include Hitachi, Mitsubishi Hitachi Power Systems, Hitachi High-Technologies.

Showing 1–50 of 606 inventors

Rank Inventor Primary Company Patents
1 Toshimichi Minowa Hitachi 170
2 Yasuo Takahashi Mitsubishi Hitachi Power Systems 91
3 Ryuji Kohno Hitachi 86
#4 Akira Hamamatsu Hitachi High-Technologies 84
#5 Hiroshi Tabata Honda Motor Co. 76
#6 Makoto Nagase Seiko Epson 64
#7 Makoto Ezumi Hitachi 55
#8 Yoshiyuki Yoneda Fujitsu Limited 50
#9 Masaki Kanai Shimadzu 44
#10 Akinobu Tanaka Shin-Etsu Chemical Co. 40
#11 Juhyun Yu Hitachi Cable 39
#11 Masahide Hayashi Hitachi Automotive Systems 39
#13 Katsuhiro Hori Mitsumi Electric Co. 36
#13 Hiroshi Narita Seiko Epson 36
#15 Muneo Maeshima Hitachi 35
#16 Seiji Suda Hitachi 31
#17 Youichi Enomoto International Superconductivity Technology Center 30
#18 Fusaji Shoji Hitachi 29
#19 Yasuhiko Mori Microsoft 26
#19 Toshio Furuhashi Hitachi 26
#21 Naoyuki Kono Hitachi-Ge Nuclear Energy 25
#21 Reiko Arai Hitachi 25
#23 Shunroku Taya Hitachi 23
#24 Katsuhiko Goto Mitsubishi Electric 22
#24 Katsunari Okamoto NTT 22
#24 Motohaya Ishii NTT 22
#27 Hiroshi Asakawa Canon 21
#27 Hideaki KIDO Renesas Electronics 21
#27 Yoshiyuki Shoji Hitachi High-Technologies 21
#27 Kazuhiko Tomita Hitachi 21
#31 Masanori Miyoshi Hitachi 20
#31 Masanobu Hanazono Hitachi 20
#31 Katsuya Ebara Hitachi 20
#34 Satoru Tomaru NTT 19
#34 Junzo Kawakami Hitachi 19
#34 Hirotaka Ono NTT 19
#34 Naofumi Chiwata Hitachi 19
#38 Saburo Imamura NTT 18
#38 Mirai Higuchi Hitachi 18
#40 Terutoshi Kanamori NTT 17
#40 Ryutaro Kikuchi Hitachi 17
#40 Koichi Arishima NTT 17
#40 Ryuzaburo Takeda Hitachi 17
#40 Masakazu Satoh Sharp Kabushiki Kaisha 17
#40 Hidekazu Fujimura Hitachi 17
#46 Masato Fukuda Hitachi High-Technologies 16
#46 Shigeki Komatsuzaki Hitachi 16
#46 Konosuke Oishi Hitachi 16
#46 Takuro Tsunaki Hitachi Automotive Systems 16
#46 Masataka Nishi Japan Atomic Energy Research Institute 16