Inventor · disambiguated record
Daniel H. Longwell
Also filed as: LONGWELL DANIEL H · LONGWELL JR DANIEL H
3 granted patents·47 citations·filing 2008–2008
71Inventor score
Technology areasE21B
Files withATP OIL & GAS CORP3
Top patents by PatentIndex Score
3 records- 0181US7588393B1Method for supporting top tension drilling and production risers on a floating vesselATP OIL & GAS CORP·Filed 2008·Granted Sep 15, 2009·23 cites·12 claims
- 0276US7886828B1Floating vessel for supporting top tension drilling and production risersATP OIL & GAS CORP·Filed 2008·Granted Feb 15, 2011·17 cites·8 claims
- 0361US7654327B1Tensioner assemblyATP OIL & GAS CORP·Filed 2008·Granted Feb 2, 2010·7 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →