Inventor · disambiguated record
Patrick M. Ljungdahl
Also filed as: LJUNGDAHL PATRICK M · LJUNGDAHL PATRICK MATTHEW
7 granted patents·52 citations·filing 2000–2017
82Inventor score
Files withWEATHERFORD TECH HOLDINGS LLC2DERR DOUGLAS N1GRIGGS PAUL STEVEN1HALLIBURTON ENERGY SERV INC1HALLIBURTON ENERGY SERVICES INC1
Top patents by PatentIndex Score
7 records- 0183US8812238B2Systems and methods for analyzing flowback compositions in real timeHALLIBURTON ENERGY SERV INC·Filed 2012·Granted Aug 19, 2014·7 cites·10 claims
- 0281US9824347B2Serialization and database methods for tubulars and oilfield equipmentWEATHERFORD TECH HOLDINGS LLC·Filed 2013·Granted Nov 21, 2017·4 cites·8 claims
- 0370US8463664B2Serialization and database methods for tubulars and oilfield equipmentGRIGGS PAUL STEVEN·Filed 2006·Granted Jun 11, 2013·13 cites·22 claims
- 0455US10825008B2Serialization and database methods for tubulars and oilfield equipmentWEATHERFORD TECH HOLDINGS LLC·Filed 2017·Granted Nov 3, 2020·0 cites·12 claims
- 0555US6494268B1Transport and support frame for a bop assemblyWEATHERFORD LAMB·Filed 2000·Granted Dec 17, 2002·28 cites·12 claims
- 0650US9671262B2Systems and methods for analyzing flowback compositions in real timeHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted Jun 6, 2017·0 cites·20 claims
- 0728US8997879B2Diverter spool and methods of using the sameDERR DOUGLAS N·Filed 2011·Granted Apr 7, 2015·0 cites·20 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →