DR

David J. Ratcliffe

EP Es Products: 1 patents #2 of 10Top 20%
Overall (All Time): #3,359,201 of 4,157,543Top 85%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7390156 Sheet metal fasteners with multiple spreadable shanks John R. Barker, Fredrick Hall, Michael S. Murphy 2008-06-24