Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Bunkyo, JP ranks #3,048 worldwide for total patents filed in 2016, with 37 patents from 23 inventors. Leading employers of inventors based in Bunkyo, JP include Kabushiki Kaisha Toshiba, Kyoto University, Fujikura.

Showing 1–23 of 23 inventors

Rank Inventor Primary Company Patents
1 Katsuyuki Naito Kabushiki Kaisha Toshiba 3
1 Hiroki Takeuchi Kyoto University 3
1 Koichi Harada Fujikura 3
1 Mitsuhiko Kitagawa Kabushiki Kaisha Toshiba 3
#5 Kazuhito Hashimoto Unknown 2
#5 Toru Matsunaga Sony 2
#5 Ryozo Nagai Nissan Chemical Industries 2
#5 Itaru Murakami Kabushiki Kaisha Toshiba 2
#5 Masaji Komoda 2
#5 Takashi Imamichi IBM 2
#11 Shuji Matsuoka Juntendo Educational Foundation 1
#11 Yoshinori Seko Taiyo Kagaku Co. 1
#11 Toru Koga Nichiman Co. 1
#11 Hiroshi Nishiyama Murata Manufacturing Co. 1
#11 Manabu Hanzaike Globalfoundries 1
#11 Kimie Murayama Unknown 1
#11 Nobuhiko Fukui Fujitsu Limited 1
#11 Masaki Ihara Ehs Lens Philippines 1
#11 Minoru Ono Fujitsu Limited 1
#11 Makoto Asakura Kabushiki Kaisha Toshiba 1
#11 Atsuko Nakayama The University Of Tokyo 1
#11 Shuta Nakanami Nichiman Co. 1
#11 Kenichiro Yoshii Kabushiki Kaisha Toshiba 1