SD

Stephen E. Dzieman

RY Ryeson: 2 patents #2 of 5Top 40%
Overall (All Time): #2,239,086 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6155147 Torque screwdriver with indexing means lock — 2000-12-05
6076439 Torque screwdriver with indexing means — 2000-06-20