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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Ichihara, JP ranks #455 worldwide for total patents filed in 2017, with 292 patents from 169 inventors. Leading employers of inventors based in Ichihara, JP include Dow Corning Toray Co., Idemitsu Kosan Co., Dow Tray Co..

Showing 1–50 of 169 inventors

Rank Inventor Primary Company Patents
1 Tomohiro Iimura Dow Corning Toray Co. 9
2 Yutaka Minami Idemitsu Kosan Co. 6
2 Hirokatsu Ito Idemitsu Kosan Co. 6
#4 Kazuhiko Kojima Dow Tray Co. 5
#4 Seiki Tamura Dow Corning Toray Co. 5
#4 Nobuyuki Koike Dexerials 5
#4 Akito Hayashi Dow Corning Toray Co. 5
#4 Haruhiko Furukawa Dow Corning Toray Co. 5
#9 Honglin Wang Showa Denko Packaging Co. 4
#9 Makoto Yoshitake Dow Corning Toray Co. 4
#9 Aya Aoki Idemitsu Kosan Co. 4
#9 Tomoaki Takebe Idemitsu Kosan Co. 4
#9 Kenji Hirata Jnc 4
#9 Masaru Isozaki Fuji Electric Fa Components & Systems Co. 4
#9 Naoyuki Kakinuma Mitsui Chemicals 4
#9 Shin Yoshida Alps Electric Co. 4
#9 Koji Matsunaga Mitsui Chemicals 4
#9 Masaaki Amako Dow Corning 4
#19 Kazuhiro Nishijima Dow Corning Toray Co. 3
#19 Ryohei Ogawa Olympus 3
#19 Mitsugu Nakae Idemitsu Kosan Co. 3
#19 Tomoyuki Imada Dic 3
#19 Yusuke Tajiri Dic 3
#19 Yoshitsugu Morita Dow Corning Toray Silicone Company 3
#19 Tadashi Kisen Idemitsu Kosan Co. 3
#19 Yutaka Satou Dic 3
#19 Takashi Sagawa Dow Corning Toray Co. 3
#19 Makoto Nakashima Sony 3
#19 Shigeki Matsui Jx Nippon Oil & Energy 3
#19 Yasuhiro Ishikawa Idemitsu Kosan Co. 3
#19 Yasushi YANAGIMOTO Mitsui Chemicals 3
#19 Shuichi Sakanoue Idemitsu Kosan Co. 3
#19 Toshihiko Nakagawa Mitsui Chemicals 3
#34 Miki Ota Sato 2
#34 Norihisa Kishimoto Canon 2
#34 Yukio Yoshida Idemitsu Kosan Co. 2
#34 Yosuke Miyazaki Nikon Vision Co. 2
#34 Kunihiro Morinaga Dic 2
#34 Naoki Hatta Mitsui Engineering & Shipbuilding Co. 2
#34 Takashi Naniki Maruzen Petrochemical Co. 2
#34 Tadakatsu Takasaki Toray Industries 2
#34 Mayumi Goto IBM 2
#34 Tomohiko Kitamura Panasonic 2
#34 Koji Ishiwata Sony 2
#34 Takuro Furukawa Maruzen Petrochemical Co. 2
#34 Keita Itakura Mitsui Chemicals 2
#34 Naohiro Takeshita Toyota 2
#34 Shinichi Kimizuka Nippon Soda Co. 2
#34 Junya Iwasaki Idemitsu Kosan Co. 2
#34 Ichiro Fujio Mitsui Toatsu Chemicals, Incorporated 2