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 151–175 of 257 patents

Patent #TitleCo-InventorsDate
5217897 Process for culturing saffron stigma tissues Hiroshi Kohda, Kazuo Yamasaki, Atsuko Koyama, Hideki Miyagawa, Naomi Fujioka +3 more 1993-06-08
5212692 Help function generation apparatus and method 1993-05-18
5171572 Barium sulfate and cosmetic compositions comprising same Hiroshi Suganuma, Satoshi Takano, Mikio Sakaguchi, Ichiro Sakamoto, Minoru Iwata +3 more 1992-12-15
5155191 Preparation process of granular polymers Takashi Abe, Kouji Ohkoshi, Atsuhiko Nitta 1992-10-13
5134047 Method of manufacturing color cathode ray tube Koki Inada, Hideaki Takazawa, Tadashi Asazuma 1992-07-28
5129439 Tire and rim assembly and tire for use therein Yasuo Wada 1992-07-14
5120673 Process of fabricating field effect transistor with LDD structure 1992-06-09
5104033 System and apparatus for and method of assembling workpieces Haruo Tanaka, Yousuke Narita, Shigeru Suzuki, Hidenori HORIE, Akira Konno 1992-04-14
5093099 Flaky powder of zinc oxide and its composition for external use Tomoyuki Haishi, Emi Sakamoto 1992-03-03
5086672 Hydraulic control apparatus for vehicle transmission system, incorporating valves for reverse inhibit valve Nobuyuki Kato, Ryoji Habuchi, Kunio Morisawa 1992-02-11
5079399 High-frequency induction heating apparatus Toshihiro Yokoo 1992-01-07
5067603 Apparatus for controlling hydraulically operated clutch in vehicle transmission system, including two valves for engaging and disengaging the clutch Nobuyuki Kato, Ryoji Habuchi, Kunio Morisawa 1991-11-26
5052980 Hydraulic control apparatus for vehicle power transmitting system having continuously variable transmission Masami Sugaya, Yoshinobu Soga, Kunio Morisawa, Ryoji Habuchi, Katsumi Kouno +2 more 1991-10-01
5052247 Hydraulic control apparatus for belt-and-pulley type continuously variable transmission, incorporating fail-safe protective means Nobuyuki Kato, Seitoku Kubo, Katsumi Kouno, Tetsuya Abe, Kunio Morisawa +1 more 1991-10-01
5050715 Hydraulic control apparatus for vehicle power transmitting system having fluid coupling incorporating lock-up clutch Kunio Morisawa, Ryoji Habuchi, Masami Sugaya, Yoshinobu Soga 1991-09-24
5039757 Method of manufacturing cationic acrylamide polymers, cationic acrylamide polymers, and the applications of these polymers Toshihiko Takaki, Kenji Tsuboi, Atsuhiko Nitta 1991-08-13
5033331 Hydraulic control device for automatic transmission for vehicle having clutch operable in two speed stages and two parallel hydraulic pressure supply passages therefor Mitsuru Takada, Tokuyuki Takahashi, Makoto Funahashi 1991-07-23
5014577 Hydraulic control device for automatic transmission for vehicle having two parallel input clutches Mitsuru Takada, Tokuyuki Takahashi, Makoto Funahashi 1991-05-14
5012700 Hydraulic control device for automatic transmission for vehicle having clutch disengage control means independent of clutch engage control means Mitsuru Takada, Tokuyuki Takahashi, Makoto Funahashi 1991-05-07
5010787 Hydraulic control device for automatic transmission for vehicle adapted to engage clutch at different speed according to engine output power Mitsuru Takada, Tokuyuki Takahashi, Makoto Funahashi 1991-04-30
5006093 Hydraulic control apparatus for vehicle power transmitting system having continuously variable transmission Masami Sugaya, Yoshinobu Soga, Kunio Morisawa, Ryoji Habuchi, Katsumi Kouno +1 more 1991-04-09
4997736 Layered electrophotographic sensitive member comprising amorphous silicon carbide Takao Kawamura, Naooki Miyamoto, Hitoshi Takemura 1991-03-05
4995284 Accumulator control device for hydraulic control device for automatic transmission for vehicle with engine load dependent backup control Mitsuru Takada, Tokuyuki Takahashi, Makoto Funahashi 1991-02-26
4994006 Automatic transmission for vehicle having stick-free radially duplicate clutches Masafumi Kinoshita, Tokuyuki Takahashi 1991-02-19
4987798 Hydraulic control device for automatic transmission for vehicle with high accuracy reverse inhibition system Makoto Funahashi, Tokuyuki Takahashi, Mitsuru Takada 1991-01-29