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

Kenichi Doi

KAKao: 2 patents #1,388 of 3,221Top 45%
KCKyoto Daiichi Kagaku Co.: 2 patents #46 of 118Top 40%
TCToppan Printing Co.: 2 patents #414 of 1,467Top 30%
TCToyo Ink Mfg. Co.: 2 patents #112 of 499Top 25%
Overall (All Time): #1,294,101 of 4,157,543Top 35%
4 Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5312591 Color test strip carrying pad for correction 1994-05-17
5296336 Dampening solution for lithographic printing Masumi Takase, Takeya Sakai, Toshio Sato, Takashi Ito, Katsuhiro Osaki 1994-03-22
5244495 Additive for lithographic dampening solution and use thereof Shintaro Yamaoka, Yoshitake Nagayama, Masanori Fujiki, Shinichi Goto, Katsuhiro Ohsaki +1 more 1993-09-14
5223438 Agent composition for detecting redox reaction 1993-06-29