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

Hiroshi Itoh

Toyota: 58 patents #127 of 26,838Top 1%
Canon: 27 patents #2,142 of 19,416Top 15%
MIMitsui Toatsu Chemicals, Incorporated: 21 patents #26 of 1,543Top 2%
LPLenovo (Singapore) Pte.: 20 patents #113 of 1,301Top 9%
NCNippondenso Co.: 12 patents #111 of 3,479Top 4%
NCNippon Shokubai Co.: 9 patents #114 of 1,108Top 15%
Sumitomo Electric Industries: 8 patents #3,473 of 21,551Top 20%
Mitsubishi Electric: 7 patents #4,301 of 25,717Top 20%
IBM: 6 patents #16,453 of 70,183Top 25%
MCMitsui Chemicals: 5 patents #388 of 2,279Top 20%
OCOlympus Optical Co.: 4 patents #789 of 2,334Top 35%
Sharp Kabushiki Kaisha: 4 patents #3,475 of 10,731Top 35%
OLOlympus: 4 patents #1,098 of 3,097Top 40%
KAKao: 4 patents #816 of 3,221Top 30%
SESeiko Epson: 4 patents #3,385 of 7,774Top 45%
UNUnknown: 4 patents #4,220 of 83,584Top 6%
Ricoh Company: 4 patents #4,167 of 9,818Top 45%
KCKuraray Co.: 4 patents #386 of 1,827Top 25%
Kyocera: 4 patents #773 of 3,732Top 25%
KCKuraray Fastening Co.: 3 patents #6 of 37Top 20%
Nec: 3 patents #4,195 of 14,502Top 30%
Nissan Motor Co.: 3 patents #2,303 of 8,689Top 30%
CLCentral Glass Company, Limited: 2 patents #334 of 968Top 35%
Honda Motor Co.: 2 patents #8,527 of 21,052Top 45%
Kabushiki Kaisha Toshiba: 2 patents #9,982 of 21,451Top 50%
Kawasaki: 2 patents #1,008 of 2,943Top 35%
KCKoken Co.: 2 patents #24 of 123Top 20%
TCTenryu Technics Co.: 2 patents #5 of 14Top 40%
TPTohoku Pioneer: 2 patents #104 of 312Top 35%
TOToshiba: 2 patents #606 of 2,688Top 25%
TKToshiba Kikai: 2 patents #223 of 713Top 35%
YMYamazaki Mazak: 2 patents #73 of 272Top 30%
Sony: 2 patents #12,963 of 25,231Top 55%
JTJapan Science And Technology: 1 patents #225 of 836Top 30%
Pioneer Electronic: 1 patents #1,093 of 1,840Top 60%
JCJapan Radio Co.: 1 patents #56 of 178Top 35%
HKHonda Giken Kabushiki Kaisha: 1 patents #5 of 184Top 3%
HZHitachi Zosen: 1 patents #216 of 531Top 45%
SCShionogi & Co.: 1 patents #620 of 1,054Top 60%
Hitachi: 1 patents #17,742 of 28,497Top 65%
SISumitomo Rubber Industries: 1 patents #1,096 of 1,637Top 70%
FLFujitsu Ten Limited: 1 patents #456 of 996Top 50%
DCDainippon Sumitomo Pharma Co.: 1 patents #107 of 256Top 45%
Fujitsu Limited: 1 patents #14,843 of 24,456Top 65%
DLDenki Kogyo Company, Limited: 1 patents #7 of 32Top 25%
TCToshiba Machine Co.: 1 patents #70 of 186Top 40%
TTToudai Tlo: 1 patents #31 of 79Top 40%
NCNew Japan Chemical Co.: 1 patents #51 of 110Top 50%
NSNippon Steel: 1 patents #2,111 of 4,423Top 50%
MPMitsubishi Tanabe Pharma: 1 patents #254 of 503Top 55%
KUKeio University: 1 patents #190 of 781Top 25%
NCNisshin Steel Co.: 1 patents #240 of 514Top 50%
KCKansai Paint Co.: 1 patents #432 of 822Top 55%
Overall (All Time): #1,866 of 4,157,543Top 1%
257 Patents All Time

Issued Patents All Time

Showing 126–150 of 257 patents

Patent #TitleCo-InventorsDate
5620926 Method for forming a contact with activation and silicide forming heat treatment 1997-04-15
5616681 Process for producing aliphatic polyester Yoshinobu Yamamoto, Koji Fukuhara, Masahiro Shiroshima, Hiroya Kobayashi 1997-04-01
5612602 Device and method comprising a motor and/or a digital signal processor, means for supplying signals of a plurality of channels in serial form, or means for causing an actuator to abut an object Yoichi Kubota, Naoki Kawamata, Masahiro Morisada, Katsuhiro Fujii, Hiroaki Takeishi 1997-03-18
5610650 Electronic parts, thermal head, manufacturing method of the thermal head, and heat sensitive recording apparatus 1997-03-11
5588133 Register block circuit for central processing unit of microcomputer Kazuyoshi Yoshida, Hiroshi Fukuoka, Makoto Shinohara 1996-12-24
5529866 Electrophotographic sensitive member Takao Kawamura, Yoshikazu Nakayama, Yasuo Nishiguchi, Naooki Miyamoto, Hitoshi Takemura 1996-06-25
5523380 Polymers having hydroxyl and carboxyl groups, and production process thereof Hideyuki Tahara, Keiji Kofuji, Masahito Takagi 1996-06-04
5519088 Hardenable composition, aqueous gel and applications thereof Takashi Abe, Hideo Kamio, Hitoshi Yamashita, Atsuhiko Nitta 1996-05-21
5459381 Composite system course control method and apparatus 1995-10-17
5450566 Register block circuit for central processing unit of microcomputer Kazuyoshi Yoshida, Hiroshi Fukuoka, Makoto Shinohara 1995-09-12
5437902 Fire-resistant glass and process for production thereof Takashi Abe, Hitoshi Yamashita, Toshihiro Yoshimura, Takeshi Hisanaga, Takao Takebayashi +2 more 1995-08-01
5391700 Process for producing polyester by ring-opening copolymerization Takashi Namba, Hiroya Kobayashi, Masashi Yukitake 1995-02-21
5372903 Method of forming a phosphor layer on CRT panel and a water soluble emulsion with photosensitivity for an intermediate layer Norihiro Tateyama, Katsutoshi Ohno, Tsuneo Kusunoki, Shuichi Nakazato, Naoki Isobe 1994-12-13
5360860 Water-soluble resin emulsion and process for preparation thereof Naoki Isobe, Tadashi Asazuma 1994-11-01
5349623 Driving circuit for exothermic resistors 1994-09-20
5340582 Barium sulfate cosmetic composition Hiroki Sugasawa, Satoshi Takano, Mikio Sakaguchi, Ichiro Sakamoto, Minoru Iwata +3 more 1994-08-23
5318873 Electroconductive magnetic carrier, developer using the same and image formation method Takao Kawamura, Yasuo Nishiguchi, Yoshio Ozawa, Yukio Ikeda, Katsuhiro Yoshioka 1994-06-07
5296266 Method of preparing microcapsule Masanao Kunugi, Hajime Kurihara 1994-03-22
5292821 Catonic acrylamide polymers and the applications of these polymers Toshihiko Takaki, Kenji Tsuboi, Atsuhiko Nitta 1994-03-08
5268286 Method for immobilizing biocatalyst in granular form with a photo-crosslinkable resin Takeshi Kobayashi, Shinji Iijima, Masamichi Kamihira, Mikiko Hata, Takamitsu Iida +2 more 1993-12-07
5262148 Process for preparing barium sulfate Hiroki Sugasawa, Satoshi Takano, Mikio Sakaguchi, Ichiro Sakamoto, Minoru Iwata +3 more 1993-11-16
5257442 Apparatus for assembling workpieces Haruo Tanaka, Yousuke Narita, Shigeru Suzuki, Hidenori HORIE, Akira Konno 1993-11-02
5256513 Electroconductive magnetic carrier, developer using the same and image formation method Takao Kawamura, Yasuo Nishiguchi, Yoshio Ozawa, Yukio Ikeda, Katsuhiro Yoshioka 1993-10-26
5239014 Cationic acrylamide polymers and the applications of these polymers Toshihiko Takaki, Kenji Tsuboi, Atsuhiko Nitta 1993-08-24
5238492 Pigment and process for producing the same Yuji Tanaka, Koji Kuroyanagi, Eiki Takeshima, Kaoru Gonoi, Takashi Shirokura +1 more 1993-08-24