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

Akira Fujishima

UNUnknown: 22 patents #172 of 83,584Top 1%
TLTakeda Pharmaceutical Company Limited: 10 patents #147 of 1,531Top 10%
CCCentral Japan Railway Comany: 9 patents #5 of 313Top 2%
TOToto: 8 patents #130 of 1,113Top 15%
Sumitomo Electric Industries: 7 patents #3,987 of 21,551Top 20%
KTKanagawa Academy Of Science And Technology: 5 patents #6 of 105Top 6%
TITakeda Chemical Industries: 4 patents #297 of 1,420Top 25%
IKIshihara Sangyo Kaisha: 3 patents #132 of 403Top 35%
TTThe University Of Tokyo: 3 patents #321 of 2,633Top 15%
TATakenaka: 3 patents #9 of 199Top 5%
NCNippon Soda Co.: 3 patents #145 of 648Top 25%
ACAisin Aw Co.: 2 patents #784 of 2,011Top 40%
Fujitsu Limited: 2 patents #10,930 of 24,456Top 45%
KRKabushikikaisha Equos Research: 2 patents #39 of 103Top 40%
Panasonic: 2 patents #9,678 of 21,108Top 50%
OSOlympus Medical Systems: 1 patents #501 of 833Top 65%
MCMitsui Mining & Smelting Co.: 1 patents #444 of 838Top 55%
KCKoyo Engineering Co.: 1 patents #5 of 11Top 50%
KSKobe Steel: 1 patents #937 of 1,773Top 55%
UCUbe-Nitto Kasei Co.: 1 patents #36 of 70Top 55%
PEPentax: 1 patents #515 of 761Top 70%
TCTaiyo Kogyo Co.: 1 patents #8 of 38Top 25%
Overall (All Time): #31,248 of 4,157,543Top 1%
68 Patents All Time

Issued Patents All Time

Showing 51–68 of 68 patents

Patent #TitleCo-InventorsDate
6117568 Cyanochromium-complex-based magnetic material Kazuhito Hashimoto, Osamu Sato, Tomokazu Iyoda 2000-09-12
6106692 Measuring concentrations of plural target substances by use of diamond electrode Keiji Kunimatsu, Toshihide Nakata, Toshiya Saito, Mayumi Kazuta, Kazuhito Hashimoto +1 more 2000-08-22
6106955 Metal material having photocatalytic activity and method of manufacturing the same Takatoshi Ogawa, Toshio Saito, Sadatoshi Ohno, Atsumichi KUSHIBE, Fumio Kamikubo +4 more 2000-08-22
6099695 ZnO-Pd composite catalyst and production method thereof Kazuhito Hashimoto, Shuzo Moroto, Masao Ando, Masako Sakai 2000-08-08
6090489 Method for photocatalytically hydrophilifying surface and composite material with photocatalytically hydrophilifiable surface Makoto Hayakawa, Eiichi Kojima, Keiichiro Norimoto, Mitsuyoshi Machida, Atsushi Kitamura +3 more 2000-07-18
6013372 Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with superhydrophilic photocatalytic surface, and method of making thereof Makoto Hayakawa, Eiichi Kojima, Keiichiro Norimoto, Mitsuyoshi Machida, Atsushi Kitamura +3 more 2000-01-11
5948355 Air-purifying filter and air-purifier for automobile Kazuhito Hashimoto, Shuzo Moroto, Masao Ando, Masako Sakai 1999-09-07
5939194 Photocatalytically hydrophilifying and hydrophobifying material Kazuhito Hashimoto, Toshiya Watanabe, Mitsuhide Shimohigoshi, Makoto Hayakawa 1999-08-17
5874701 Photocatalytic air treatment process under room light Toshiya Watanabe, Atushi Kitamura, Eiichi Kojima, Kazuhito Hashimoto 1999-02-23
5855595 Tumor treatment apparatus Kazuhito Hashimoto, Yoshinobu Kubota, Rensuke Adachi, Teruyuki Kakeda 1999-01-05
5851990 bFGF mutein and its production Tsunehiko Fukuda 1998-12-22
5668076 Photocatalyst and method for preparing the same Yasuhide Yamagushi, Masatoshi Yamazaki, Kazuhito Hashimoto 1997-09-16
5643436 Architectural material using metal oxide exhibiting photocatalytic activity Takatoshi Ogawa, Yasuhiko Yoshioka, Nobuo Tsubouchi, Toshio Saito, Tamotsu Hasegawa +1 more 1997-07-01
5595813 Architectural material using metal oxide exhibiting photocatalytic activity Takatoshi Ogawa, Yasuhiko Yoshioka, Nobuo Tsubouchi, Toshio Saito, Tamotsu Hasegawa +1 more 1997-01-21
5547823 Photocatalyst composite and process for producing the same Sadao Murasawa, Hajime Murakami, Yasuro Fukui, Mitsuru Watanabe, Kazuhito Hashimoto 1996-08-20
5445997 Patterning method Shigeo Kondo 1995-08-29
5126921 Electronic component and a method for manufacturing the same Shigeo Kondo 1992-06-30
4675634 Variable-capacitance tuning circuit for high-frequency signals Seiji Matsushita, Isao Arika, Joji Nakamura 1987-06-23