Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Ichikawa, JP ranks #1,739 worldwide for total patents filed in 2017, with 75 patents from 47 inventors. Leading employers of inventors based in Ichikawa, JP include Sumitomo Metal Mining Co., Kabushiki Kaisha Toshiba, Fujitsu Limited.

Showing 1–47 of 47 inventors

Rank Inventor Primary Company Patents
1 Tokuyuki Nakayama Sumitomo Metal Mining Co. 7
2 Shinya Nunoue Kabushiki Kaisha Toshiba 5
3 Kensuke Kuraki Fujitsu Limited 4
3 Yousuke Hata Canon 4
#5 Makiko Kida Helen Of Troy Limited 3
#5 Miyako Miyoshi Kabushiki Kaisha Toshiba 3
#7 Shoji Sakamoto 2
#7 Haruo Ishizuka Canon 2
#7 Kazunori Murayama Fujitsu Limited 2
#7 Asim Munawar IBM 2
#7 Haruyasu Ueda Fujitsu Limited 2
#7 Noriyuki Yamashita Sony 2
#7 Takeshi Osaki Toyo Gosei Co. 2
#7 Masaya Yukinobu Sumitomo Metal Mining Co. 2
#15 Risa Wada Toyo Gosei Co. 1
#15 Kazufumi Suzukawa Hitachi Ulsi Systems Co. 1
#15 Mitsunobu Miratsu Sumitomo Metal Mining Co. 1
#15 Shin Goto Canon 1
#15 Shinichiro Tosa Rakuten Group 1
#15 Mitsuo Hori Advantest 1
#15 Mitsuhiko Sugane Fujitsu Limited 1
#15 Yasunori Ono Daiichi Sankyo Company, Limited 1
#15 Masatomo Mizuno Nikon 1
#15 Hisato YASUMATSU Uchicago Argonne 1
#15 Yu Okada Toyota 1
#15 Tetsuya Hashimoto Ricoh Company 1
#15 Junichi Otsu Terumo Kabushiki Kaisha 1
#15 Yusuke Esaka Canon 1
#15 Haruhiko Koyama Kabushiki Kaisha Toshiba 1
#15 Norikazu Sashida Taiyo Yuden Co. 1
#15 Masuyoshi Yamada Hitachi 1
#15 Eiji Nagao Fujitsu Limited 1
#15 Kenji Koshiishi Nisshin Steel Co. 1
#15 Takehito Tamura Texas Instruments 1
#15 Shigekazu Uji Ishikawajima-Harima Heavy Industries Co. 1
#15 Katsuo Sato Tdk 1
#15 Norimichi Yonesato Sumitomo Metal Mining Co. 1
#15 Yuji Takatsuka Mitsubishi Electric 1
#15 Masanori Takagi Sumitomo Metal Mining Co. 1
#15 Tetsuya Shinohara Nissan Motor Co. 1
#15 Kazuhiro Konno IBM 1
#15 Tetsumei Tsuruoka Fujitsu Limited 1
#15 Tomoji Takimoto Kawasaki 1
#15 Naoki Akahori Kabushiki Kaisha Toshiba 1
#15 Kenichiro Uotani Canon 1
#15 Terutoshi Taguchi Fujitsu Limited 1
#15 Kentaro Sawamura Tdk 1