Assignee
HELWIG STEFAN L
US·3 granted patents·7 citations·filing 2009–2012
Top patents by PatentIndex Score
3 records- 0157US8134369B2Method of testing electric field recording of a marine electromagnetic sensor cableHELWIG STEFAN L·Filed 2009·Granted Mar 13, 2012·4 cites·8 claims
- 0252US8148990B2Marine electromagnetic acquisition apparatus with foldable sensor arm assemblyHELWIG STEFAN L·Filed 2009·Granted Apr 3, 2012·3 cites·15 claims
- 0348US8810248B2Method of testing electric field recording of a marine electromagnetic sensor cableHELWIG STEFAN L·Filed 2012·Granted Aug 19, 2014·0 cites·9 claims
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