AO

Akira Oshima

Overall (1989): #31,631 of 140,708Top 25%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4872642 Seal mechanism for butterfly valve with press contacting seal effective in both inflow and outflow directions 1989-10-10
4860994 Seal system for butterfly valve 1989-08-29