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

Eiichi Kato

Fujitsu Limited: 199 patents #1 of 24,456Top 1%
Kawasaki: 5 patents #446 of 2,943Top 20%
FUFujifilm: 4 patents #1,747 of 4,519Top 40%
TCThe Kinki Sharyo Co.: 3 patents #2 of 22Top 10%
Canon: 2 patents #12,681 of 19,416Top 70%
KKKabushiki Kaisha Vitamin Kenkyusya: 1 patents #9 of 19Top 50%
MIMitsui Petrochemical Industries: 1 patents #503 of 1,024Top 50%
NCNippon Paper Industries Co.: 1 patents #263 of 535Top 50%
JCJujo Paper Co.: 1 patents #46 of 105Top 45%
FCFuji Photo Co.: 1 patents #1 of 51Top 2%
Soma, JP: #1 of 570 inventorsTop 1%
Overall (All Time): #2,787 of 4,157,543Top 1%
217 Patents All Time

Issued Patents All Time

Showing 101–125 of 217 patents

Patent #TitleCo-InventorsDate
5526102 Method of forming a color image and apparatus used therefor 1996-06-11
5501929 Method for preparation of printing plate by electrophotographic process Sadao Osawa 1996-03-26
5498503 Electrophotographic light-sensitive material Kazuo Ishii 1996-03-12
5459005 Electrophotographic light-sensitive material Kazuo Ishii 1995-10-17
5409795 Process of producing nonaqueous resin dispersion and liquid developer for electrostatic photography 1995-04-25
5400630 Method for producing regenerated cylinder, method for producing regenerated electrophotography photosensitive drum employing the method, and bulging apparatus for the methods Toru Okumura, Yasuyoshi Takai 1995-03-28
5395721 Electrophotographic material for color proofing Sadao Osawa 1995-03-07
5393625 Electrophotolithographic printing plate precursor Seishi Kasai, Kazuo Ishii 1995-02-28
5391445 Electrophotographic material for color proofing Sadao Osawa 1995-02-21
5382488 Electrophotographic light-sensitive material Kazuo Ishii 1995-01-17
5368931 Lithographic printing plate precursor of direct image type Kazuo Ishii 1994-11-29
5342725 Liquid developer for electrostatic photography 1994-08-30
5342716 Electrophotographic lithographic printing plate precursor Seishi Kasai 1994-08-30
5338628 Electrophotographic light-sensitive material Kazuo Ishii 1994-08-16
5334475 Liquid developer for electrostatic photography 1994-08-02
5308730 Liquid developer for electrostatic photography Nobuo Suzuki, Yutaka Sakasai, Seiji Horie 1994-05-03
5298357 Liquid developer for electrostatic photography and duplicating method using the same Hideyuki Hattori, Kazuo Ishii 1994-03-29
5294507 Electrophotographic lithographic printing plate precursor Seishi Kasai 1994-03-15
5293179 Work convey method and apparatus Fumio Ichikawa, Kunio Ohtaki, Tsuyoshi Orikawa 1994-03-08
5275916 Direct-image type lithographic printing plate precursor 1994-01-04
5258249 Electrophotographic lithographic printing plate precursor 1993-11-02
5254422 Electrophotographic lithographic printing plate precursor Kazuo Ishii 1993-10-19
5252419 Electrophotographic light-sensitive material comprising resin containing acidic groups at random and comb-like resin containing macromonomer comprising AB block copolymer Seishi Kasai, Kazuo Ishii 1993-10-12
5250376 Electrophotographic lithographic printing plate Akio Oda, Hiroshi Tashiro 1993-10-05
5242772 Process for the production of a lithographic printing plate of direct image type Kazuo Ishii 1993-09-07