RD

Robert Dunk

HA Harsco: 2 patents #15 of 125Top 15%
Overall (All Time): #2,256,865 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5799448 Adjustable closed-riser metal staircase system — 1998-09-01
D389588 Stair tread having a slip-resistant surface — 1998-01-20