SK

Suketsugu Koumura

SC Sumitomo Chemical: 2 patents #1,792 of 4,033Top 45%
📍 Ibaraki, JP: #3,280 of 6,779 inventorsTop 50%
Overall (All Time): #2,369,920 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4257770 Disazo dye composition Nobuzi Nishimura, Masayuki Tsuji, Seizo Konishi, Tadashi Yamamoto, Takemi Tokieda +1 more 1981-03-24
4230852 Triazinyl-antraquinone dyes Yoshihisa Sueda, Kazuyoshi Hirabayashi, Hirohito Kenmochi, Hisashige Terao, Yoshio Mori 1980-10-28