Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Bunkyo, JP ranks #2,184 worldwide for total patents filed in 2017, with 58 patents from 36 inventors. Leading employers of inventors based in Bunkyo, JP include Kabushiki Kaisha Toshiba, Unknown, Ichikawa Co..

Showing 1–36 of 36 inventors

Rank Inventor Primary Company Patents
1 Katsuyuki Naito Kabushiki Kaisha Toshiba 5
2 Po-Chin Huang Unknown 4
3 Mitsuhiko Kitagawa Kabushiki Kaisha Toshiba 3
3 Ai Tamura Ichikawa Co. 3
3 Motomu Kanai Japan Science And Technology Agency 3
#6 Chie Umehara Ichikawa Co. 2
#6 Yohei Soma Japan Science And Technology Agency 2
#6 Toshifumi Irisawa Kabushiki Kaisha Toshiba 2
#6 Masaki Ihara Ehs Lens Philippines 2
#6 Yasuhiko Arakawa The University Of Tokyo 2
#6 Yuya Takamori Ichikawa Co. 2
#6 Takashi Michikawa Ihi 2
#6 Ryo Umehara Ichikawa Co. 2
#6 Kenichiro Yoshii Kabushiki Kaisha Toshiba 2
#15 John Gulik Toshiba Medical Systems 1
#15 Ryo Arashida Euglena Co. 1
#15 Yuma Akune Fujitsu Limited 1
#15 Tomoyo Ogishima Ichikawa Co. 1
#15 Shigeo Maruyama The University Of Tokyo 1
#15 Itaru Murakami Kabushiki Kaisha Toshiba 1
#15 Fujun Li The University Of Tokyo 1
#15 Taichi Ando Nissan Motor Co. 1
#15 Yuki MATSUO Fujitsu Limited 1
#15 Akihito Hamano Fujitsu Limited 1
#15 Ryu Ohsugi The University Of Tokyo 1
#15 Kenji Uno Seed Co. 1
#15 Shigeyuki Yamabe Bridgestone 1
#15 Suguru Kondo 1
#15 Yasuhiko Tomino Denka Seiken Co. 1
#15 Haosheu Zhou The University Of Tokyo 1
#15 Naohiro Aoki The University Of Tokyo 1
#15 Taichi SAKAI Ichikawa Co. 1
#15 Hiroshi Nishiyama Murata Manufacturing Co. 1
#15 Akira SUGIYAMA Savid Therapeutics 1
#15 Kazuhito Hashimoto Unknown 1
#15 Suguru Dohi Taiho Pharmaceutical Co. 1