Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
JW

Junichi Watanabe — 92 Patents

Hitachi: 15 patents #2,639 of 28,497Top 10%
Ricoh Company: 14 patents #1,580 of 9,818Top 20%
NINissan Chemical Industries: 12 patents #104 of 1,150Top 10%
SCShin-Etsu Chemical Co.: 9 patents #445 of 2,176Top 25%
Fujitsu Limited: 6 patents #5,180 of 24,456Top 25%
YEYaskawa Electric: 5 patents #154 of 1,006Top 20%
Panasonic: 4 patents #6,210 of 21,108Top 30%
SCStanley Electric Co.: 3 patents #245 of 1,072Top 25%
YAYazaki: 2 patents #1,635 of 3,427Top 50%
FLFujitsu Microelectronics Limited: 2 patents #92 of 624Top 15%
FLFujitsu Semiconductor Limited: 2 patents #355 of 1,301Top 30%
HOHoya: 2 patents #523 of 1,290Top 45%
KCKyowa Hakko Kogyo Co.: 2 patents #380 of 943Top 45%
MIMitsui Petrochemical Industries: 2 patents #322 of 1,024Top 35%
OCOsaka Soda Co.: 2 patents #19 of 87Top 25%
PVPioneer Video: 1 patents #67 of 139Top 50%
SCSumitomo Bakelite Co.: 1 patents #403 of 790Top 55%
TCTaiyo Yuden Co.: 1 patents #643 of 959Top 70%
Pioneer Electronic: 1 patents #1,093 of 1,840Top 60%
NCNippon Zeon Co.: 1 patents #307 of 609Top 55%
NONippon Oil: 1 patents #392 of 773Top 55%
Nec: 1 patents #7,928 of 14,502Top 55%
NCNikkiso Co.: 1 patents #168 of 287Top 60%
MCMitsumi Electric Co.: 1 patents #527 of 935Top 60%
Kawasaki: 1 patents #1,551 of 2,943Top 55%
Shizuoka, JP: #33 of 6,644 inventorsTop 1%
Overall (All Time): #17,129 of 4,157,543Top 1%
92 Patents All Time
Junichi Watanabe has been granted 92 US patents while listed as an inventor at Hitachi. The first was granted in 1980 and the most recent in November 2025. Junichi Watanabe ranks #17,129 of 4,157,543 US inventors in our database (top 0.41%). Patent records list Junichi Watanabe in Shizuoka, JP.

Issued Patents All Time

Showing 1–25 of 92 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12458650 Urination disorder-improving agent Hiroto Kobayashi, Atsushi Shinbo, Youichi Nakano, Yuta Ito 2025-11-04
12346062 Toner, toner storage unit, image forming apparatus and method of forming image Toshihiko SUGIYAMA, Yuka Mizoguchi, Hiroshi Yamashita, Kazuoki Fuwa, Tsuneyasu Nagatomo 2025-07-01
12078961 Toner, method of manufacturing toner, toner storage unit, image forming apparatus and method of forming image Yuka Mizoguchi, Hiroshi Yamashita, Tomomi Harashima 2024-09-03 $645,000
11809154 Multi-axis control adjustment apparatus, multi-axis control adjustment system, and multi-axis control adjustment method Minoru Koga, Isamu Matsumura, Toshinobu Kira, Tetsuya Asai 2023-11-07
10712681 Toner, toner storage unit, image forming apparatus, and method for manufacturing toner Minoru Masuda, Atsushi Yamamoto, Taichi Nemoto, Taro Araki, Takeshi Shibuya 2020-07-14
10324390 Toner, developer, and image forming apparatus Akihiro Takeyama, Takahiro Kadota 2019-06-18
10153598 Terminal and charging connector with temperature measurement Hiroshi Moriguchi, Daisuke Sugiyama 2018-12-11
10131555 Method and apparatus for controlling concentration of free chlorine, and sterilization method and sterilization apparatus each utilizing said method and said apparatus Masakazu Tanahashi, Masato Fujiwara, Rongfu Lu 2018-11-20
10057992 Ceramic circuit substrate and its production method Hiroyuki Teshima, Hisayuki Imamura 2018-08-21
9804516 Toner, developer, image forming apparatus, and process cartridge Keiji Makabe, Tsuneyasu Nagatomo, Kohsuke Satoh, Kenji Yoneda, Daichi Hisakuni 2017-10-31
9791794 Toner, developer, and image forming apparatus Kenji Yoneda, Kohsuke Satoh, Tsuneyasu Nagatomo, Keiji Makabe, Daichi Hisakuni 2017-10-17
9780011 Brazing material, brazing material paste, ceramic circuit substrate, ceramic master circuit substrate, and power semiconductor module Hisayuki Imamura, Suguru Fujita 2017-10-03
9537431 Brake diagnosis device and brake diagnosis method Mitsujiro Sawamura, Daichi Horimai 2017-01-03
9385465 Terminal spacer Daisuke Sugiyama, Takashi Tsukamoto 2016-07-05
8912869 Electromagnetic relay Kazuhiko Horii, Naoki Muro 2014-12-16
8858865 Silicon nitride substrate manufacturing method, silicon nitride substrate, silicon nitride circuit substrate, and semiconductor module Youichirou Kaga, Hisayuki Imamura 2014-10-14
8728700 Reactor, toner production method, and toner Kenichi Uehara 2014-05-20
8718299 Audio control device and audio output device Hideki Nishimura 2014-05-06
8652854 Manufacturing method of a semiconductor device Tomohiro Takamatsu, Ko Nakamura, Wensheng Wang, Naoyuki Sato, Aki Dote +4 more 2014-02-18
8586493 Silicon nitride sintered body, method of producing the same, and silicon nitride circuit substrate and semiconductor module using the same Youichirou Kaga 2013-11-19
8563869 Circuit board and semiconductor module using this, production method for circuit board Youichirou Kaga, Hisayuki Imamura 2013-10-22
8557497 Method of manufacturing toner and toner Kenichi Uehara, Junya Koeda, Daisuke Misawa, Keisuke Tada, Miyuki Hirata 2013-10-15
8471656 Electromagnetic relay Kazuhiko Horii, Naoki Muro 2013-06-25
8396242 Sound receiver 2013-03-12
8315418 Sound receiver 2012-11-20