RO

Ryozo Okumura

DE Denso: 17 patents #571 of 11,792Top 5%
IC Idemitsu Petrochemical Co.: 10 patents #19 of 578Top 4%
IC Idemitsu Kosan Co.: 1 patents #699 of 1,237Top 60%
NS Nippon Soken: 1 patents #783 of 1,540Top 55%
Overall (All Time): #139,823 of 4,157,543Top 4%
28
Patents All Time

Issued Patents All Time

Showing 26–28 of 28 patents

Patent #TitleCo-InventorsDate
5306802 Polycarbonate copolymer and method for production thereof Shigeki Kuze, Noriyuki Kunishi 1994-04-26
5191040 Process for producing styrenic polymer Kiichi Izumida 1993-03-02
4957964 Thermoplastic resin composition Eiichi Terada, Shigemi Kawazoe 1990-09-18