SJ

Svein Erling Johnstad

NA Norsk Hydro Asa: 5 patents #30 of 584Top 6%
📍 Jessheim, NO: #6 of 55 inventorsTop 15%
Overall (All Time): #739,610 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
9176254 Electromagnetic and seismic streamer cable and method for using such a streamer cable 2015-11-03
8299794 Method for electromagnetic geophysical surveying of subsea rock formations Brian Anthony Farrelly 2012-10-30
7982465 Electromagnetic method on shallow water using a controlled source Harald Westerdahl, Brian Anthony Farrelly 2011-07-19
7812611 Shallow marine electromagnetic hydrocarbon prospecting Brian Anthony Farrelly 2010-10-12
7456632 Method for monitoring low-resistivity formation using polarized waves Fan-Nian Kong, Harald Westerdahl 2008-11-25
7453265 Device for monitoring of oil-water interface Fan-Nian Kong, Harald Westerdahl 2008-11-18
7453763 Geophysical data acquisition system 2008-11-18