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

Takashi Kojima — 177 Patents

DCDwango Co.: 39 patents #1 of 56Top 2%
Denso: 20 patents #415 of 11,792Top 4%
Nec: 14 patents #843 of 14,502Top 6%
Toyota: 13 patents #2,130 of 26,838Top 8%
PCPowdertech Co.: 12 patents #9 of 66Top 15%
MCMitsubishi Gas Chemical Company: 12 patents #143 of 1,727Top 9%
Sony: 11 patents #4,043 of 25,231Top 20%
SESeiko Epson: 6 patents #2,663 of 7,774Top 35%
Tdk: 6 patents #953 of 3,796Top 30%
FIFujifilm Business Innovation: 4 patents #505 of 1,659Top 35%
Fujitsu Limited: 4 patents #7,093 of 24,456Top 30%
MLMitsubishi Petrochemical Company Limited: 3 patents #122 of 670Top 20%
Honda Motor Co.: 3 patents #6,619 of 21,052Top 35%
JTJtekt: 3 patents #557 of 1,969Top 30%
NCNippondenso Co.: 2 patents #1,150 of 3,479Top 35%
CCChukyo Medical Co.: 2 patents #3 of 6Top 50%
SCSumitomo Chemical: 2 patents #1,792 of 4,033Top 45%
Sumitomo Electric Industries: 2 patents #9,741 of 21,551Top 50%
NSNippon Soken: 2 patents #546 of 1,540Top 40%
QOQoncept: 1 patents #3 of 8Top 40%
RPRaqualia Pharma: 1 patents #33 of 69Top 50%
SCSanten Pharmaceutical Co.: 1 patents #178 of 291Top 65%
CCCse Co.: 1 patents #5 of 11Top 50%
SCShibaura Engineering Works Co.: 1 patents #8 of 28Top 30%
TLTakeda Pharmaceutical Company Limited: 1 patents #859 of 1,531Top 60%
The Yokohama Rubber Co.: 1 patents #666 of 1,136Top 60%
TMToyoda Van Moppes: 1 patents #16 of 39Top 45%
TCTs Tech Co.: 1 patents #323 of 561Top 60%
YAYazaki: 1 patents #2,077 of 3,427Top 65%
CACalsonic: 1 patents #72 of 204Top 40%
Brother Kogyo: 1 patents #2,155 of 2,767Top 80%
HCHitec Co.: 1 patents #14 of 21Top 70%
ACAkebono Research And Development Centre: 1 patents #29 of 79Top 40%
INInax: 1 patents #78 of 242Top 35%
TLToyota Central R&D Labs: 1 patents #823 of 1,657Top 50%
KAKao: 1 patents #1,961 of 3,221Top 65%
Mitsubishi Electric: 1 patents #15,491 of 25,717Top 65%
HCHakko Electric Machine Works Co.: 1 patents #8 of 14Top 60%
FCFuji Manufacturing Co.: 1 patents #14 of 29Top 50%
DCDainippon Ink And Chemicals: 1 patents #446 of 1,002Top 45%
Overall (All Time): #4,379 of 4,157,543Top 1%
177 Patents All Time

Issued Patents All Time

Showing 151–175 of 177 patents

Patent #TitleCo-InventorsDate
6036829 Oxygen sensor Hirokazu Yamada, Makoto Hori, Masahiro Hamaya, Minoru Ota 2000-03-14
6016362 Apparatus and method for image coding and decoding Motoki Kato 2000-01-18
5998566 Phenol derivatives and process for their production Takafumi Yoshimura 1999-12-07
5900129 Oxygen concentration sensor Nobuyuki Tsuji, Isao Watanabe, Masahiro Hamaya, Minoru Ohta, Naoto Miwa 1999-05-04
5875003 Apparatus and method for encoding a digital video signal Motoki Kato 1999-02-23
5762771 Air-fuel ratio sensor Hirokazu Yamada, Toshimi Miyamoto, Koji Shiozawa, Makoto Hori, Masahiro Hamaya +1 more 1998-06-09
5759365 Oxygen concentration sensor Hirokazu Yamada 1998-06-02
5719986 Video signal encoding method Motoki Kato 1998-02-17
5706655 Thin-walled double pipe exhaust manifold Yasuo Fukae 1998-01-13
5644018 Pitch with reduced tendency to smoke during spinning and a process for the production of said pitch Yasuhiro Hirai, Takafumi Yoshimura 1997-07-01
5609800 Process for producing high-density and high-strength carbon artifacts showing a fine mosaic texture of optical anisotropy Isao Mochida, Ryuji Fujiura, Hitoshi Sakamoto 1997-03-11
5547654 Self-adhesive carbonaceous grains and high density carbon artifacts derived therefrom Isao Machida, Ryuji Fujiura, Hitoshi Sakamoto 1996-08-20
5506892 System for performing at least one of a checking and adjusting operations for electronic equipment using a telephone Kazuyuki Ogawa 1996-04-09
5484520 Self-adhesive carbonaceous grains and process for producing high-density and high-strength carbon artifacts showing a fine mosaic texture of optical anisotropy derived from such grains Isao Mochida, Ryuji Fujiura, Hitoshi Sakamoto 1996-01-16
5443935 Electrophotographic photoreceptor Shinichi Suzuki, Yasuyuki Shigematsu 1995-08-22
5372702 Composition for use in the production of composite carbon materials, composition carbon material produced therefrom, and process for producing the same Hitoshi Sakamoto 1994-12-13
5344733 Electrophotographic receptor Shinichi Suzuki, Yasuyuki Shigematsu, Hiroe Kizaki, Akira Itsubo 1994-09-06
5279777 Process for the production of friction materials Hitoshi Sakamoto, Nobuo Kamioka, Hiroshi Tokumura 1994-01-18
5209239 Apparatus for cystographic inspection Hideki Watanabe, Masaru Maruyama 1993-05-11
5163234 Hand drier control apparatus Ryohei Tsukamoto, Tadanobu Hosaka, Akio Nara, Hidetaka Hayashi 1992-11-17
4956392 Process for producing methanol or mixed alcohol Yoshihiko Saito, Osamu Hashimoto, Masaaki Kuwa, Kinya Tsuji 1990-09-11
4893834 Automotive knee bolster Kiyoshi Honda, Tsukasa Itoh 1990-01-16
4863763 Process for producing molecular orientated film Kenji Takeda, Ken Ishikawa, Tatsuo Kanetake, Akira Itsubo 1989-09-05
4666945 Catalyst composition suitable for synthesis of methanol Minoru Osugi, Makoto Takagawa, Tadasi Nakamura, Kinya Tsuji 1987-05-19
4360621 Low viscous p-phenylene diamine stabilizers Osamu Kimura, Eizo Okino, Hideo Nagasaki 1982-11-23