Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Kai, JP ranks #8,853 worldwide for total patents filed all time, with 239 patents from 43 inventors. Leading employers of inventors based in Kai, JP include Tokico, Tokyo Electron Limited, Seiko Epson.

Showing 1–43 of 43 inventors

Rank Inventor Primary Company Patents
1 Masaru Sakuma Tokico 32
2 Kazuki Denpoh Tokyo Electron Limited 20
2 Yasuhiro ITAYAMA Seiko Epson 20
#4 Shota YAMAMOTO Toyota 19
#5 Akira Ozawa Honda Motor Co. 15
#5 Ayae Sawado Seiko Epson 15
#7 Katsunori Wada Taiyo Nippon Sanso 14
#8 Kimio Iino Taiyo Nippon Sanso 10
#9 Takashi Sakuda Seiko Epson 9
#9 Yuuki Nishimura Nipro 9
#11 Masayoshi Tanimura Nintendo Co. 6
#11 Tetsuya Noge Hal Laboratory 6
#11 Fumihito Baisho Seiko Epson 6
#11 Naoki SEINO Taiyo Nippon Sanso 6
#15 Yumi Todo Hal Laboratory 4
#15 Tomoyuki Haneji Taiyo Nippon Sanso 4
#15 Shiro Nagashima Hitachi Automotive Systems 4
#15 Ryoichiro Atono Hal Laboratory 4
#19 Akira Hakozaki Nisca 3
#19 Hiroki Oono Taiyo Nippon Sanso 3
#19 Kazunori Koishi Tadano 3
#22 Yoshinari Iwai Hitachi Automotive Systems 2
#22 Ayumu Kato Nintendo Co. 2
#22 Teruyuki Gunji Hal Laboratory 2
#22 Masaaki Fukunaga Hal Laboratory 2
#22 Yoshiki Nishiwaki Taiyo Nippon Sanso 2
#27 Tomokazu Tsuruoka Hal Laboratory 1
#27 Michiko KAWAJI Seiko Epson 1
#27 Tomonobu Abe Taiyo Nippon Sanso 1
#27 Toru Tamaru Hitachi Automotive Systems 1
#27 Masanobu Sakata Hal Laboratory 1
#27 Shinichiro Tani 1
#27 Shintaro Dobashi Seiko Epson 1
#27 Hiroki Aota Taiyo Nippon Sanso 1
#27 Shinichi Kawaji Hal Laboratory 1
#27 Katsuyoshi Sumitomo Hal Laboratory 1
#27 Takahisa Kazuno Nisca 1
#27 Yoshito Nakagomi Nisca 1
#27 Fumihiro Narita Hal Laboratory 1
#27 Michiko Yamasaki Seiko Epson 1
#27 Hitoshi Kikkawa Hal Laboratory 1
#27 Akihiro Muramoto Hitachi 1
#27 Katsuhiro Sakoda Hal Laboratory 1