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

Toshio Hatada — 32 Patents

Hitachi: 31 patents #867 of 28,497Top 4%
HCHitachi Chemical Company: 1 patents #1,071 of 1,946Top 60%
OCOsaka Gas Co.: 1 patents #252 of 689Top 40%
TCToho Gas Co.: 1 patents #14 of 69Top 25%
Overall (All Time): #114,446 of 4,157,543Top 3%
32 Patents All Time

Issued Patents All Time

Showing 26–32 of 32 patents

Patent #TitleCo-InventorsDate
5077601 Cooling system for cooling an electronic device and heat radiation fin for use in the cooling system Takayuki Atarashi, Takahiro Daikoku, Satomi Kobayashi, Shizuo Zushi, Fumiyuki Kobayashi +1 more 1991-12-31
4841744 Double effect air cooled absorption refrigerating machine Shigekichi Kurosawa, Yoshikazu Nagaoka, Shinichi Kannoh, Sadatoshi Takemoto, Shigeo Sugimoto +5 more 1989-06-27
4791984 Heat transfer fin Tomihisa Oouchi, Yoshifumi Kunugi, Shigeo Sugimoto, Junichi Kaneko 1988-12-20
4503907 Heat exchanger coated with aqueous coating composition Tatsumi Tanaka, Kiyoshi Hikita, Masaru Furuhashi, Katsuzi Nakano, Akira Arai 1985-03-12
4500035 Expansion valve Shigeaki Kuroda, Takao Senshu, Kensaku Oguni, Taketoshi Mochizuki, Hiromu Yasuda +3 more 1985-02-19
4365667 Heat exchanger Takao Senshu, Akira Arai, Fumio Harada, Atsushi Matsuzaki, Hajime Futawatari +2 more 1982-12-28
4300629 Cross-fin tube type heat exchanger Takao Senshu, Akira Arai, Fumio Harada, Atsushi Matsuzaki, Hajime Futawatari +2 more 1981-11-17