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

Tomoya Ogawa — 29 Patents

MEMecta: 23 patents #1 of 74Top 2%
RKRikagaku Kenkyusho: 8 patents #2 of 207Top 1%
KCKanto Ishi Pharmaceutical Co.: 4 patents #2 of 18Top 15%
MIMitsui Toatsu Chemicals, Incorporated: 1 patents #880 of 1,543Top 60%
TCTeikoku Chemical Industry Co.: 1 patents #6 of 31Top 20%
Overall (All Time): #133,030 of 4,157,543Top 4%
29 Patents All Time

Issued Patents All Time

Showing 26–29 of 29 patents

Patent #TitleCo-InventorsDate
4675391 Glycoside derivatives Shohei Shibayama, Yuzi Matsuzaki, Shoji Yoshimura, Masayoshi Ito, Yoshiyasu Shitori 1987-06-23
4663443 N-substituted neuraminic acid derivatives Shohei Shibayama, Shoji Yoshimura, Masayoshi Ito, Yoshiyasu Shitori 1987-05-05
4447605 Di(tri-lower alkylstannyl)pyrimidine derivative and a process for producing the same Masanao Matsui 1984-05-08
4324895 Novel process for producing pyrimidine nucleosides and novel pyrimidine nucleosides obtained thereby Masanao Matsui 1982-04-13