YS

Yutaka Sumida

CC Chiyoda Chemical Entineering & Constructions Co.: 1 patents #41 of 119Top 35%
KK Kureha Kagaku Kogyo: 1 patents #332 of 607Top 55%
Overall (All Time): #4,116,768 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4214979 Method of thermally cracking heavy petroleum oil Hajime Nakanishi, Kiyoji Ozaki, Toshio Shinozuka, Masato Izumi, Takaaki Aiba +2 more 1980-07-29