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

Hiroshi Kitaguchi — 109 Patents

Hitachi: 72 patents #100 of 28,497Top 1%
Fujitsu Limited: 30 patents #760 of 24,456Top 4%
FUFujifilm: 4 patents #1,747 of 4,519Top 40%
FIFuji Immunopharmaceuticals: 2 patents #3 of 20Top 15%
UNUnknown: 2 patents #12,644 of 83,584Top 20%
HEHitachi-Ge Nuclear Energy: 1 patents #139 of 313Top 45%
SCSchering: 1 patents #1,469 of 2,442Top 65%
Naka, JP: #1 of 152 inventorsTop 1%
Overall (All Time): #12,249 of 4,157,543Top 1%
109 Patents All Time

Issued Patents All Time

Showing 101–109 of 109 patents

Patent #TitleCo-InventorsDate
4626500 Heat-developable photographic light-sensitive material Kozo Sato, Hiroyuki Hirai 1986-12-02
4610957 Heat-developable light-sensitive material Masatoshi Kato 1986-09-09
4591716 Radioactive concentration measuring apparatus Masaaki Fujii 1986-05-27
4591720 Method of measuring radioactivity Masaaki Fuji, Yuichi Izumi 1986-05-27
4546075 Heat-developable photographic material Isamu Itoh, Itsuo Fujiwara, Yasushi Nozawa, Tadayoshi Kokubo 1985-10-08
4532103 Apparatus for measuring concentration of radioactivity Masashi Kudo, Masaaki Fujii 1985-07-30
4528258 Process for forming image Hideki Naito 1985-07-09
4473632 Heat-developable color photographic material Kozo Sato, Shinsaku Fujita, Hideki Naito 1984-09-25
4452885 Heat-developable photographic material Yasushi Nozawa, Tadayoshi Kokubo, Isamu Itoh 1984-06-05