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

Hiroshi Yamazaki — 401 Patents

KOKonica: 46 patents #4 of 1,958Top 1%
Tdk: 27 patents #163 of 3,796Top 5%
KMKonica Minolta: 26 patents #9 of 1,361Top 1%
Sony: 21 patents #1,931 of 25,231Top 8%
KSKyocera Document Solutions: 18 patents #115 of 1,545Top 8%
NTNTT: 18 patents #151 of 4,871Top 4%
HCHitachi Chemical Company: 16 patents #69 of 1,946Top 4%
NDNitto Denko: 16 patents #187 of 2,479Top 8%
SCSeikosha Co.: 15 patents #15 of 312Top 5%
Mitsubishi Electric: 14 patents #1,823 of 25,717Top 8%
KMKonica Minolta: 12 patents #175 of 2,718Top 7%
OCOhi Seisakusho Co.: 12 patents #7 of 196Top 4%
Kabushiki Kaisha Toshiba: 12 patents #2,533 of 21,451Top 15%
Fujitsu Limited: 10 patents #3,161 of 24,456Top 15%
Ricoh Company: 10 patents #2,244 of 9,818Top 25%
Nissan Motor Co.: 9 patents #795 of 8,689Top 10%
ENEnplas: 9 patents #32 of 255Top 15%
CHChisso: 8 patents #104 of 833Top 15%
NHNamiki Seimitsu Houseki: 7 patents #3 of 108Top 3%
MCMabuchi Motor Co.: 5 patents #19 of 228Top 9%
NCNippon Shokubai Co.: 5 patents #248 of 1,108Top 25%
HSHarmonic Drive Systems: 5 patents #31 of 147Top 25%
FCFuji Kiko Co.: 5 patents #22 of 208Top 15%
Canon: 5 patents #9,253 of 19,416Top 50%
AKAsahi Kasei Kabushiki Kaisha: 5 patents #67 of 1,220Top 6%
KCKonishiroku Photo Industry Co.: 5 patents #175 of 894Top 20%
SPSeiko Precision: 4 patents #31 of 173Top 20%
KMKyocera Mita: 4 patents #152 of 763Top 20%
UNUnknown: 3 patents #7,366 of 83,584Top 9%
KIKabushiki Kaisha Isowa: 3 patents #10 of 54Top 20%
LPLenovo (Singapore) Pte.: 3 patents #409 of 1,301Top 35%
ACAdamant Namiki Precision Jewel Co.: 3 patents #5 of 58Top 9%
YKYasuhiro Koike: 3 patents #5 of 25Top 20%
NCNagano Japan Radio Co.: 2 patents #9 of 49Top 20%
O2O2Micro: 2 patents #65 of 174Top 40%
NCNissan Shatai Co.: 2 patents #11 of 67Top 20%
Nec: 2 patents #5,510 of 14,502Top 40%
NCNavitime Japan Co.: 2 patents #8 of 16Top 50%
CUCarleton University: 2 patents #1 of 34Top 3%
Sumitomo Electric Industries: 2 patents #9,741 of 21,551Top 50%
Sharp Kabushiki Kaisha: 2 patents #5,184 of 10,731Top 50%
DCDainippon Pharmaceutical Co.: 2 patents #58 of 207Top 30%
IRInstitute Of Physical And Chemical Research: 2 patents #33 of 172Top 20%
KZKabushiki Kaisha Zuken: 2 patents #2 of 29Top 7%
MSMitsubishi Heavy Industries Thermal Systems: 2 patents #71 of 149Top 50%
FUFukuoka University: 2 patents #5 of 64Top 8%
ICIkeda Bussan Co.: 2 patents #63 of 235Top 30%
HCHidan Co.: 2 patents #5 of 17Top 30%
SCSumitomo Chemical: 1 patents #2,469 of 4,033Top 65%
AFAsahi Kasei Fibers: 1 patents #35 of 96Top 40%
CLCanadian Patents And Development Limited: 1 patents #88 of 449Top 20%
CPChisso Petrochemical: 1 patents #69 of 139Top 50%
DCDainippon Sumitomo Pharma Co.: 1 patents #107 of 256Top 45%
DKDenki Kagaku Kogyo: 1 patents #291 of 655Top 45%
FUFuji: 1 patents #263 of 422Top 65%
FCFuji Machine Mfg. Co.: 1 patents #140 of 245Top 60%
FUFujifilm: 1 patents #3,076 of 4,519Top 70%
FTFujitsu Display Technologies: 1 patents #84 of 137Top 65%
FLFujitsu Microelectronics Limited: 1 patents #212 of 624Top 35%
HRHagiwara Research: 1 patents #3 of 6Top 50%
JMJapan Electronic Materials: 1 patents #16 of 40Top 40%
JCJgc Catalysts And Chemicals: 1 patents #74 of 139Top 55%
JSJsp: 1 patents #80 of 134Top 60%
KCKoito Manufacturing Co.: 1 patents #610 of 1,047Top 60%
MCMaruzen Petrochemical Co.: 1 patents #83 of 174Top 50%
MMMitsubishi Mining: 1 patents #886 of 2,247Top 40%
NSNippon Sanso: 1 patents #107 of 243Top 45%
NENtt Electronics: 1 patents #160 of 358Top 45%
OCOki Electric Industry Co.: 1 patents #1,459 of 2,807Top 55%
OMOmron: 1 patents #1,808 of 3,089Top 60%
Pioneer: 1 patents #1,107 of 1,730Top 65%
RKRikagaku Kenkyusho: 1 patents #70 of 207Top 35%
SESeiko Epson: 1 patents #5,551 of 7,774Top 75%
SKSeiko Koki Kabushiki Kaisha: 1 patents #23 of 27Top 90%
ATAT&T: 1 patents #10,626 of 18,772Top 60%
TKTanaka Kikinzoku Kogyo K.K.: 1 patents #216 of 436Top 50%
Stanford University: 1 patents #2,251 of 5,197Top 45%
YAYamatake: 1 patents #76 of 243Top 35%
Overall (All Time): #631 of 4,157,543Top 1%
401 Patents All Time

Issued Patents All Time

Showing 376–400 of 401 patents

Patent #TitleCo-InventorsDate
4770979 Developer composition Shigeharu Koboshi, Toshifumi Iijima 1988-09-13
4766578 Method of setting time in digital clock and system therefor Kazuhiko Shiratori 1988-08-23
4720457 Selective production of ethyl acetate and acetaldehyde by microorganisms David W. Armstrong, Stanley M. Martin 1988-01-19
4708924 Pressure fixable microcapsule type toner Tatsuo Nagai, Shinichi Suzuki 1987-11-24
4702579 Automatic film sensitivity change-over device Masuo Ogihara, Hajime Oda, Yoichi Seki 1987-10-27
4697908 Program shutter Masuo Ogihara, Hajime Oda, Yoichi Seki 1987-10-06
4696560 Camera shutter Masuo Ogihara, Hajime Oda, Yoichi Seki 1987-09-29
4693583 Programmable shutter Masuo Ogihara, Hajime Oda, Yoichi Seki 1987-09-15
4692393 Photoreceptor having a photosensitive layer containing an azo compound Akira Kinoshita, Kazumasa Watanabe, Naohiro Hirose 1987-09-08
4673955 Ink receptacle for ink jet printer Minoru Ameyama, Takuro Isayama, Shuzo Matsumoto, Yasuo Katano, Kyuhachiro Iwasaki 1987-06-16
4648701 Control circuit for program shutter Masuo Ogihara, Hajime Oda, Yoichi Seki 1987-03-10
4613377 Production of fructose syrup Kouchi Matsumoto 1986-09-23
4586058 Ink jet printing apparatus Takuro Isayama, Minoru Ameyama, Shuzo Matsumoto, Yasuo Katano 1986-04-29
4583026 Low-pressure mercury vapor discharge lamp Toshiro Kajiwara, Yoshinori Anzai, Takeo Saikatsu, Goroku Kobayashi, Yoshiji Minagawa 1986-04-15
4559544 Multi-nozzle head for ink on-demand type ink jet printer Shuzo Matsumoto, Takuro Isayama, Yasuo Katano 1985-12-17
4535339 Deflection control type ink jet recorder Masanori Horike, Tatsuya Furukawa, Yutaka Ebi 1985-08-13
4520090 Magnetic toner Kiyoshi Tamaki 1985-05-28
4491627 Light-sensitive silver halide photographic material with microcapsules that dissolve at pH of at least 7 Toshifumi Iijima, Shigeharu Koboshi 1985-01-01
4461774 Antifungal imidazolylcarboxylic acids and their derivatives Ikutaro Saji, Shunji Aono, Katsuaki Ichise, Takao Okuda 1984-07-24
4328432 Anti-blooming charge transfer device 1982-05-04
RE30917 Two-phase charge transfer device image sensor Yoshiaki Hagiwara 1982-04-27
4301459 Ink ejection apparatus comprising entrained air removal means Takuro Isayama, Hiromichi Komai, Tsutomu Sato 1981-11-17
4300144 Multiple-nozzle ink-jet recording apparatus Takuro Isayama, Hiromichi Komai, Tsutomu Sato 1981-11-10
4296418 Ink jet printing apparatus with reverse solvent flushing means Takuro Isayama 1981-10-20
4291316 System for driving ink drop generator of ink-jet printer Sadao Kakeno, Taisen Hayashi, Hiromichi Komai 1981-09-22