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USPTO Patent Rankings Data through Dec 31, 2025
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Chichibu, JP All Time

1,322 patents  ·  144 inventors

Ranked #2,370 of 112,640 cities Top 3%

Chichibu, JP ranks #2,370 worldwide for total patents filed all time, with 1,322 patents from 144 inventors. Leading employers of inventors based in Chichibu, JP include Bridgestone Sports Co., Showa Denko K.K., Seiko Epson.

Showing 1–50 of 144 inventors

Rank Inventor Primary Company Patents
1 Katsunori Sato Bridgestone Sports Co. 126
2 Atsuki Kasashima Bridgestone Sports Co. 92
3 Takashi Udagawa Showa Denko K.K. 81
#4 Rinya Takesue Bridgestone Sports Co. 79
#5 Jun Shindo Bridgestone Sports Co. 67
#6 Junji Umezawa Bridgestone Sports Co. 61
#7 Eiji Takehana Bridgestone Sports Co. 47
#8 Hideyuki Kawai Seiko Epson 41
#8 Fumio Shimada Canon 41
#10 Kae Iizuka Bridgestone Sports Co. 29
#10 Shunichi Kashiwagi Bridgestone Sports Co. 29
#12 Yuichiro Ozawa Bridgestone Sports Co. 28
#12 Ryouichi Takeuchi Showa Denko K.K. 28
#12 Hirotaka Shinohara Bridgestone Sports Co. 28
#15 Atuki Kasasima Bridgestone Sports Co. 22
#16 Noritaka Muraki Showa Denko K.K. 20
#17 Takayuki Wakabayashi Canon 17
#17 Toru Ogawana Bridgestone Sports Co. 17
#19 Masashi Shimamura Canon 16
#19 Minoru Tsuruta Olympus Optical Co. 16
#21 Yutaka Tajima Honda Motor Co. 15
#21 Michio Yanagi Canon 15
#23 Akira Miyasaka Showa Denko K.K. 12
#23 Masanobu Kuwahara Bridgestone Sports Co. 12
#23 Yoshitaka Nishihara Showa Denko K.K. 12
#26 Kenji Momose Showa Denko K.K. 11
#26 Keisuke Fukada Showa Denko K.K. 11
#26 Hirotada Iwade Bridgestone Sports Co. 11
#29 Tadao Hirano Casio Computer Co. 10
#30 Wataru Nabekura Showa Denko K.K. 9
#30 Ryuichi Negishi Canon 9
#32 Yasuyuki Sakaguchi Showa Denko K.K. 8
#32 Kae Yamazaki Bridgestone Sports Co. 8
#32 Yoshiaki Kageshima Showa Denko K.K. 8
#32 Naoto ISHIBASHI Showa Denko K.K. 8
#32 Masae Ikeda Fujitsu Limited 8
#32 Noriyuki Aihara Showa Denko K.K. 8
#38 Mitsuaki Murata Taiheiyo Cement 7
#38 Tadahiro NARITA Bridgestone Sports Co. 7
#40 Junji Hamana Canon 6
#40 Atsushi Yoshinaga Showa Denko K.K. 6
#40 Yoshikazu Umeta Showa Denko K.K. 6
#40 Yoichi Omura Bridgestone Sports Co. 6
#40 Toshiro Wachi Bridgestone Sports Co. 6
#40 Takuichi Shimizu Bridgestone Sports Co. 6
#46 Toru Wakazawa Canon 5
#46 Norio Hirokawa Showa Denko 5
#46 Hiroshi Azami Ricoh Company 5
#46 Takaharu Hoshina Showa Denko K.K. 5
#46 Michiya Odawara Showa Denko K.K. 5

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