YK

Yasujiro Koyama

NC Nippon Kokan Co.: 1 patents #11 of 72Top 20%
Overall (1982): #22,519 of 81,411Top 30%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4334858 Prevention of thermal spalling in ceramic products Makoto Iiyama 1982-06-15