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

Takayasu Kitagawa — 3 Patents

SCShionogi & Co.: 3 patents #298 of 1,054Top 30%
Overall (All Time): #1,660,678 of 4,157,543Top 40%
3 Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5132429 Benzotriazole derivatives and fluorescence-emitting reagents thereof Shigeru Narita 1992-07-21
5097040 Benzotriazole derivatives and reagents for determining carboxylic acids thereof Shigeru Narita 1992-03-17
5003076 Benzotriazole derivatives and chiral derivatization reagents for carboxylic acids thereof Shigeru Narita 1991-03-26