Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Kosai, JP ranks #1,433 worldwide for total patents filed all time, with 2,349 patents from 373 inventors. Leading employers of inventors based in Kosai, JP include Denso, Yazaki, Tachi-S Co..

Showing 1–50 of 373 inventors

Rank Inventor Primary Company Patents
1 Yoshiaki Takano Denso 123
2 Hidehiko Kuboshima Yazaki 81
3 Shigemi Hashizawa Yazaki 73
#4 Akira Nemoto Tachi-S Co. 57
#5 Kenji Imamura Toyota 53
#6 Koji Mikami Canon 48
#7 Hidenori Shiotsuka Canon 47
#8 Tomoyuki Fujii Ngk Insulators 38
#9 Shinichiro Ito Toyota 34
#10 Yoshitsugu Sawada Yazaki 33
#11 Yoshimasa Kataumi Fuji Kiko Co. 32
#12 Tomoyuki Hara Nissan Motor Co. 31
#13 Tsukasa Sekino Yazaki 30
#14 Tadahiro Sueyoshi Yazaki 29
#15 Yoshifumi Takeyama Canon 28
#15 Atsuyoshi Yamaguchi Yazaki 28
#17 Takashi Tsuchida Mitsubishi Materials 27
#17 Hidehiro Ichikawa Yazaki 27
#17 Yasuhiro Mochizuki Hitachi 27
#20 Noriyuki Fujioka Toyota 26
#20 Takaharu Kondo Canon 26
#22 Tadahiko Kato Univance 25
#23 Katsuhiro Imaki Ono Pharmaceutical Co. 24
#23 Tomoyasu Terada Yazaki 24
#23 Takashi Umeno Mitsubishi Pencil Company, Limited 24
#23 Keiichi Ozaki Yazaki 24
#23 Toshihiko Makita Yazaki 24
#28 Isao Ikegaya Fuji Kiko Co. 22
#28 Takashi Nagaya Canon 22
#30 Chie Morita Asmo Co. 21
#31 Eiichi Toyama Yazaki 20
#31 Yuichi Sonoda Canon 20
#33 Katsuhiro Kubota Yazaki 19
#34 Kimitoshi Makino Yazaki 18
#34 Ryuetsu Oikawa Yazaki 18
#36 Hideyuki Baba Sumitomo Electric Industries 16
#36 Akihiro Miwa Yamaha 16
#38 Isamu Sasaki Fuji Electrochemical Co. 15
#38 Masami Muramatsu Ajinomoto Co. 15
#38 Kazuyuki Hirai Asmo Co. 15
#38 Masayuki Kuwano Asmo Co. 15
#42 Kazuyuki Shibata Asmo Co. 14
#42 Hideharu Hayashi Yazaki 14
#44 Masahiko Morinaga Kansai Electric Power Co. 13
#45 Yoshimichi Sahara Asmo Co. 12
#45 Keizaburo Kuramasu Sumitomo Electric Industries 12
#45 Takeyuki Hamaguchi Yazaki 12
#45 Masanori Nakanishi Fdk 12
#49 Yoshiki Okumura Fujitsu Limited 11
#49 Takahiro Iwaki Yazaki 11