DH

Dag Håverstad

AA Aker Kvaerner Mh As: 2 patents #1 of 6Top 20%
📍 Nodeland, NO: #1 of 4 inventorsTop 25%
Overall (All Time): #2,106,017 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7931077 Top drive drilling apparatus Bjørn Rudshaug 2011-04-26
7743853 Top drive drilling apparatus Bjørn Rudshaug 2010-06-29