OO

Ole A. Opsahl

📍 Drammen, NO: #2 of 4 inventorsTop 50%
Overall (1989): #72,096 of 140,708Top 55%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4832803 Removal of chlorides from concrete Oystein Vennesland 1989-05-23