Masakazu Takeuchi

Sharp Kabushiki Kaisha: 5 patents #3,007 of 10,731Top 30%

GJ Gradco Japan: 5 patents #6 of 46Top 15%

KS Kyocera Document Solutions: 4 patents #749 of 1,545Top 50%

AC Advics Co.: 3 patents #181 of 686Top 30%

NC Nippon Steel Chemical Co.: 3 patents #38 of 380Top 10%

EI Eisai: 2 patents #451 of 998Top 50%

EC Eisai R&D Management Co.: 2 patents #329 of 817Top 45%

Aisin Seiki Kabushiki Kaisha: 1 patents #2,094 of 3,782Top 60%

📍 Ashiya, MI: #1 of 1 inventorsTop 100%

Overall (All Time): #153,816 of 4,157,543Top 4%

Patents All Time

Issued Patents All Time

Showing 26–26 of 26 patents

Patent #	Title	Co-Inventors	Date
4608127	Dibenzofuran distillation and crystallization process	Kiyoshi Sakuma, Tadao Tomioka, Sunao Tabuchi, Kihachiro Ohta	1986-08-26