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 76–100 of 217 patents

Patent #TitleCo-InventorsDate
5700612 Method for preparation of printing plate by electrophotographic process Yusuke Nakazawa, Kazuo Ishii 1997-12-23
5691094 Method for preparation of printing plate by electrophotographic process and apparatus for use therein 1997-11-25
5689785 Color image forming method and apparatus used therefor Sadao Osawa 1997-11-18
5683841 Method for preparation of waterless lithographic printing plate by electrophotographic process 1997-11-04
5677098 Image formation method using beam exposure Takao Nakayama, Kazuo Ishii 1997-10-14
5670283 Electrophotographic material for color proofing Sadao Osawa 1997-09-23
5658701 Method for preparation of waterless lithographic printing plate by electrophotographic process 1997-08-19
5652076 Method for preparation of printing plate by electrophotographic process Hiroyuki Oishi, Kazuo Ishii 1997-07-29
5648191 Method for preparation of printing plate by electrophotographic process Yusuke Nakazawa 1997-07-15
5648190 Method of forming color images and apparatus used therefor Sadao Osawa, Yusuke Nakazawa 1997-07-15
5626996 Electrophotographic material for color proofing Sadao Osawa 1997-05-06
5624777 Electrophotographic lithographic printing plate precursor Hiroshi Tashiro, Akio Oda, Kazuo Ishii 1997-04-29
5620822 Method for preparation of printing plate by electrophotographic process Yusuke Nakazawa, Sadao Osawa 1997-04-15
5607533 Method for preparation of printing plate by electrophotographic process and apparatus for use therein 1997-03-04
5601958 Method for preparation of printing plate by electrophotographic process Makoto Momota, Hiroyuki Ohishi 1997-02-11
5597672 Method for preparation of printing plate by electrophotographic process 1997-01-28
5589308 Method for preparation of printing plate by electrophotographic process Makoto Momota, Hiroyuki Ohishi 1996-12-31
5582941 Color image forming method Sadao Osawa 1996-12-10
5582943 Method of forming an electrophotographic color transfer image and electrophotographic light-sensitive material for use therein Yusuke Nakazawa, Sadao Osawa 1996-12-10
5580690 Electrophotographic light-sensitive material Kazuo Ishii 1996-12-03
5573879 Electrophotographic light-sensitive material Kazuo Ishii 1996-11-12
5565290 Desensitizing solution for offset printing Ryosuke Itakura, Seishi Kasai, Hidefumi Sera 1996-10-15
5561014 Method for preparation of printing plate by electrophotographic process and apparatus for use therein 1996-10-01
5558966 Electrophotographic light-sensitive material Kazuo Ishii 1996-09-24
5527622 Packaging laminate material Eiji Takahashi, Hiroshi Kondo, Hiroji Niimi, Takashi Hiraoka, Masayuki Sakai +1 more 1996-06-18