Hiroshi Oka

JR Japan Synthetic Rubber: 6 patents #48 of 558Top 9%

Canon: 4 patents #10,118 of 19,416Top 55%

KC Kohjin Co.: 4 patents #3 of 109Top 3%

Rohm Co.: 4 patents #677 of 2,292Top 30%

Kyocera: 2 patents #1,365 of 3,732Top 40%

OC Otsuka Pharmaceutical Co.: 1 patents #681 of 1,273Top 55%

Fujitsu Limited: 1 patents #14,843 of 24,456Top 65%

Sharp Kabushiki Kaisha: 1 patents #6,861 of 10,731Top 65%

SM St. Marianna University School Of Medicine: 1 patents #7 of 29Top 25%

SC Sumitomo Chemical: 1 patents #2,469 of 4,033Top 65%

KA Kao: 1 patents #1,961 of 3,221Top 65%

TK Toda Kogyo: 1 patents #197 of 328Top 65%

Overall (All Time): #152,368 of 4,157,543Top 4%

Patents All Time

Issued Patents All Time

Showing 26–26 of 26 patents

Patent #	Title	Co-Inventors	Date
4268447	Process for producing tetrahydrofuran and 1,4-butanediol	Yoshinori Yoshida	1981-05-19