Inventor · disambiguated record
Svein Erling Johnstad
Also filed as: JOHNSTAD SVEIN ERLING
7 granted patents·122 citations·filing 2004–2009
86Inventor score
Top patents by PatentIndex Score
7 records- 0180US7453763B2Geophysical data acquisition systemNORSK HYDRO AS·Filed 2004·Granted Nov 18, 2008·51 cites·26 claims
- 0276US7456632B2Method for monitoring low-resistivity formation using polarized wavesNORSK HYDRO AS·Filed 2004·Granted Nov 25, 2008·17 cites·17 claims
- 0372US7982465B2Electromagnetic method on shallow water using a controlled sourceMULTIFIELD GEOPHYSICS AS·Filed 2007·Granted Jul 19, 2011·7 cites·17 claims
- 0468US9176254B2Electromagnetic and seismic streamer cable and method for using such a streamer cableJOHNSTAD SVEIN ERLING·Filed 2009·Granted Nov 3, 2015·11 cites·20 claims
- 0561US8299794B2Method for electromagnetic geophysical surveying of subsea rock formationsFARRELLY BRIAN ANTHONY·Filed 2007·Granted Oct 30, 2012·9 cites·14 claims
- 0658US7812611B2Shallow marine electromagnetic hydrocarbon prospectingNORSK HYDRO AS·Filed 2006·Granted Oct 12, 2010·6 cites·17 claims
- 0758US7453265B2Device for monitoring of oil-water interfaceNORSK HYDRO AS·Filed 2004·Granted Nov 18, 2008·21 cites·20 claims
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