KT

Katsumi Tomura

IC Idemitsu Kosan Co.: 1 patents #13 of 55Top 25%
Overall (1989): #89,538 of 140,708Top 65%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4849021 Process for producting coal fillers Masayuki Nakai, Kenji Uesugi 1989-07-18