Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
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Koichi Kitazawa — 5 Patents

UNUnknown: 8 patents #1,262 of 83,584Top 2%
DIDaikin Industries: 1 patents #1,764 of 2,957Top 60%
JSJapan Society For The Promotion Of Science: 1 patents #5 of 13Top 40%
Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%
Tdk: 1 patents #2,493 of 3,796Top 70%
TTThe University Of Tokyo: 1 patents #1,000 of 2,633Top 40%
Overall (All Time): #1,037,527 of 4,157,543Top 25%
5 Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
6902065 Method for separation of plastic mixtures based on magneto-archimedes levitation Tsunehisa Kimura, Shogo Mamada, Masafumi Yamato 2005-06-07
6482775 Oxide superconductor Mikio Takano, Zenji Hiroi, Yoshichika Bando, Takahito Terashima, Kohji Kishio +3 more 2002-11-19
5733458 Material interface changing method Hiroharu Sugawara, Noriyuki Hirota, Takuro Homma, Satoshi Maruyama, Shinichi Yamashita +1 more 1998-03-31
5360786 Superconductive material Shoji Tanaka, Shin-ichi Uchida, Hidenoir Takagi 1994-11-01
5352657 Bismuth system oxide superconductors and preparation thereof Utako Endo, Satoshi Koyama, Kazuo Okamura, Tomoji Kawai 1994-10-04