HR

Heinrich Jan Roelofs

Overall (All Time): #2,050,459 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
8727670 Tunnel barrier 2014-05-20
7708070 Shaft plugging system 2010-05-04