Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
HT

Hirofumi Takeuchi — 38 Patents

TOToto: 18 patents #34 of 1,113Top 4%
UNUnknown: 8 patents #1,262 of 83,584Top 2%
OCOtsuka Pharmaceutical Co.: 5 patents #166 of 1,273Top 15%
KCKowa Company: 2 patents #203 of 562Top 40%
SCShowa Yakuhin Kako Co.: 2 patents #14 of 52Top 30%
SCShinko Electric Industries Co.: 2 patents #315 of 723Top 45%
NCNippon Soda Co.: 2 patents #207 of 648Top 35%
BOBonac: 1 patents #14 of 20Top 70%
THTheravalues: 1 patents #6 of 21Top 30%
NINikon: 1 patents #1,647 of 2,493Top 70%
CACovestro Deutschland Ag: 1 patents #436 of 964Top 50%
TLToyota Central R&D Labs: 1 patents #823 of 1,657Top 50%
Mazda Motor: 1 patents #2,563 of 4,755Top 55%
MCMitsubishi Chemical: 1 patents #1,511 of 3,022Top 50%
NINagoya Industrial Science Research Institute: 1 patents #20 of 79Top 30%
NCNihon Tokushu Toryo Co.: 1 patents #9 of 57Top 20%
Overall (All Time): #85,840 of 4,157,543Top 3%
38 Patents All Time

Issued Patents All Time

Showing 26–38 of 38 patents

Patent #TitleCo-InventorsDate
5109550 Flush water supply system for toilet stool Atsuo Makita, Shinji Shibata, Noboru Shimbara 1992-05-05
5087455 Hollow granular medicine and its preparation Toshiyuki Niwa, Yoshiaki Kawashima, Yoji Ito 1992-02-11
5085399 Automatically operating valve for regulating water flow and faucet provided with said valve Osamu Tsutsui, Hisato Haraga, Kinya Arita, Atsuo Makita, Ryoichi Tsukada 1992-02-04
5057323 Hollow granular medicine and its preparation Toshiyuki Niwa, Yoshiaki Kawashima, Yoji Ito 1991-10-15
5052060 Flush water supply system for toilet stool Atsuo Makita, Shinji Shibata, Noboru Shimbara 1991-10-01
4989277 Toilet bowl flushing device Osamu Tsutsui, Hisato Haraga, Atsuo Makita 1991-02-05
4971106 Automatically operating valve for regulating water flow and faucet provided with said valve Osamu Tsutsui, Hisato Haraga, Kinya Arita, Atsuo Makita, Ryoichi Tsukada 1990-11-20
4967794 Automatically operating valve for regulating water flow and faucet provided with said valve Osamu Tsutsui, Hisato Haraga, Kinya Arita, Atsuo Makita, Ryoichi Tsukada 1990-11-06
4955535 Automatically operating valve for regulating water flow and faucet provided with said valve Osamu Tsutsui, Hisato Haraga, Kinya Arita, Atsuo Makita, Ryoichi Tsukada 1990-09-11
4768705 Cold/hot water discharging apparatus Osamu Tsutsui, Yukihiro Muroya, Keiji Hayashi, Shingo Tanaka 1988-09-06
4761836 Washing device for parts of human body Osamu Tsutsui, Hirohiko Yasuda, Hidehiko Kuwahara, Keiji Hayashi, Mitsuhiro Higuchi +1 more 1988-08-09
4739923 Hot/cold water mixing device Osamu Tsutsui, Yukihiro Muroya, Keiji Hayashi 1988-04-26
4726966 Preparation of coated granular ibuprofen microsphere Yoshiaki Kawashima, Toshiyuki Niwa, Tetsurou Handa 1988-02-23