Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Ichihara, JP ranks #478 worldwide for total patents filed in 2016, with 259 patents from 167 inventors. Leading employers of inventors based in Ichihara, JP include Dow Corning Toray Co., Idemitsu Kosan Co., Mitsui Chemicals.

Showing 1–50 of 167 inventors

Rank Inventor Primary Company Patents
1 Haruhiko Furukawa Dow Corning Toray Co. 7
1 Hirokatsu Ito Idemitsu Kosan Co. 7
3 Tomohiro Iimura Dow Corning Toray Co. 6
3 Toshihiko Nakagawa Mitsui Chemicals 6
#5 Naoyuki Kakinuma Mitsui Chemicals 5
#6 Shigeki Matsui Jx Nippon Oil & Energy 4
#6 Nobuyuki Koike Dexerials 4
#6 Seiki Tamura Dow Corning Toray Co. 4
#6 Koji Matsunaga Mitsui Chemicals 4
#10 Yoshiharu Hirai Jnc 3
#10 Koju Okazaki Mitsui Chemicals 3
#10 Mayumi Goto IBM 3
#10 Ryohei Ogawa Olympus 3
#10 Kazuhisa Kumazawa Nippon Soda Co. 3
#10 Hiroki Sekiguchi Idemitsu Kosan Co. 3
#10 Makoto Nakashima Sony 3
#10 Yasuhiro Ishikawa Idemitsu Kosan Co. 3
#10 Masaru Isozaki Fuji Electric Fa Components & Systems Co. 3
#10 Tomoyuki Imada Dic 3
#10 Tomoyuki Okuyama Seiko Epson 3
#10 Akito Hayashi Dow Corning Toray Co. 3
#10 Daisuke Ootsuki Jnc 3
#10 Yukio Yoshida Idemitsu Kosan Co. 3
#24 Hiromoto Shibata Nippon Soda Co. 2
#24 Eisuke Yokoyama Toyoda Gosei Co. 2
#24 Masanobu Maeda Fujitsu Ten Limited 2
#24 Koichi Sano Hitachi 2
#24 Toyohiko Fujisawa Dow Corning Toray Co. 2
#24 Naoya FUKUMOTO Showa Denko K.K. 2
#24 Akihiko Nagano Canon 2
#24 Takakazu Kage Dic 2
#24 Kazumoto Chiba Japan Petroleum Exploration Co. 2
#24 Toru Masatomi Dow Corning Toray Silicone Company 2
#24 Takashi Sagawa Dow Corning Toray Co. 2
#24 Sayuri Sawayama Dow Corning Toray Co. 2
#24 Yoshimitsu Tanabe Mitsui Toatsu Chemicals, Incorporated 2
#24 Hidetoshi Ono Idemitsu Kosan Co. 2
#24 Takashi Hodota Toyoda Gosei Co. 2
#24 Yukiko Nagao Idemitsu Kosan Co. 2
#24 Yasuhiko Matsuoka Asahi Glass Co. 2
#24 Honglin Wang Showa Denko Packaging Co. 2
#24 Yasushi Tohi Mitsui Chemicals 2
#24 Hiroaki Motegi Idemitsu Kosan Co. 2
#24 Nagahisa Miyagawa Jnc 2
#24 Tomohiko Kitamura Panasonic 2
#24 Junya Iwasaki Idemitsu Kosan Co. 2
#24 Dongmi Shin Dic 2
#24 Masataka MIYASATO Mitsui Chemicals 2
#24 Kazuhiko Saigusa Jnc 2
#50 Shuichi Sakanoue Idemitsu Kosan Co. 1