DY

Douwe Ybema

CO Cominco: 2 patents #19 of 133Top 15%
Overall (All Time): #2,360,081 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4479863 Cell top insulator Ronald N. Honey, Robert E. Manwell, Clifford J. Krauss 1984-10-30
4345980 Electrowinning of zinc Richard T. Chow, Clifford J. Krauss 1982-08-24