DB

David D. Black

CM Chicago Rawhide Manufacturing: 1 patents #13 of 28Top 50%
AS Ab Skf: 1 patents #19 of 70Top 30%
Overall (All Time): #2,296,843 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5346662 Method of manufacturing a composite seal John B. Wagner 1994-09-13
5183269 Unitized grit seal with removable thrust bumper Anthony W. Vering 1993-02-02