DH

Dirk Holtkamp

UN Unknown: 3 patents #7,366 of 83,584Top 9%
AW Aloys Wobben: 1 patents #6 of 16Top 40%
Overall (All Time): #1,233,848 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
8294291 Turbine for a hydroelectric power station Rolf Rohden 2012-10-23
8215255 Ship rudder and ship provided therewith Aloys Wobben, Rolf Rohden 2012-07-10
D580844 Ship Rolf Rohden, Thomas Bohlen 2008-11-18
D536657 Ship Rolf Rohden 2007-02-13