Inventor · disambiguated record
Douglas Jahnke
Also filed as: JAHNKE DOUGLAS · JAHNKE DOUGLAS A · JAHNKE DOUGLAS AARON
23 granted patents·175 citations·filing 2004–2021
95Inventor score
Top patents by PatentIndex Score
23 records- 0196US10436193B1Cylinder liner retainer system with torque multiplier and methodPREMIUM OILFIELD TECH LLC·Filed 2017·Granted Oct 8, 2019·30 cites·10 claims
- 0296US10041490B1Quick change cylindrical liner retainer assemblyPREMIUM OILFIELD TECH LLC·Filed 2016·Granted Aug 7, 2018·31 cites·12 claims
- 0395US9169710B2Wellsite connector with piston driven collets and method of using sameNAT OILWELL VARCO LP·Filed 2013·Granted Oct 27, 2015·23 cites·30 claims
- 0494US10036384B1Quick release piston rod assemblyPREMIUM OILFIELD TECH LLC·Filed 2016·Granted Jul 31, 2018·10 cites·14 claims
- 0591US9909580B2Reduced torque valve cover lock assemblyPREMIUM OILFIELD TECH LLC·Filed 2016·Granted Mar 6, 2018·6 cites·20 claims
- 0691US8162046B2Blowout preventer with shearing bladesJAHNKE DOUGLAS·Filed 2011·Granted Apr 24, 2012·13 cites·29 claims
- 0790US8443880B1Blowout preventer with shearing bladesJAHNKE DOUGLAS·Filed 2013·Granted May 21, 2013·11 cites·47 claims
- 0887US11686173B2Rotary control device with self-contained hydraulic reservoirPREMIUM OILFIELD TECH LLC·Filed 2021·Granted Jun 27, 2023·2 cites·20 claims
- 0987US8443879B2Blowout preventer with shearing bladesJAHNKE DOUGLAS·Filed 2012·Granted May 21, 2013·8 cites·34 claims
- 1087US8167031B2Blowout preventer with shearing bladesJAHNKE DOUGLAS·Filed 2011·Granted May 1, 2012·9 cites·16 claims
- 1184US10895337B2Pipe union assemblyPREMIUM OILFIELD TECH LLC·Filed 2018·Granted Jan 19, 2021·3 cites·15 claims
- 1280US10408328B1Epicyclic washpipe swivel cartridge and methodPREMIUM OILFIELD TECH LLC·Filed 2017·Granted Sep 10, 2019·3 cites·15 claims
- 1379US9169713B2Blowout preventer with locking ram assembly and method of using sameNAT OILWELL VARCO LP·Filed 2013·Granted Oct 27, 2015·5 cites·20 claims
- 1476US9869148B2Wellsite connector with floating seal member and method of using sameNAT OILWELL VARCO LP·Filed 2013·Granted Jan 16, 2018·4 cites·28 claims
- 1575US9506313B2Contoured ram bore on type U blowout preventerJAHNKE DOUGLAS·Filed 2012·Granted Nov 29, 2016·5 cites·21 claims
- 1673US10830233B2Reduced torque lock assemblyPREMIUM OILFIELD TECH LLC·Filed 2018·Granted Nov 10, 2020·1 cites·20 claims
- 1773US9169712B2Blowout preventer locking door assembly and method of using sameNAT OILWELL VARCO LP·Filed 2013·Granted Oct 27, 2015·4 cites·22 claims
- 1865US9410383B2Method and apparatus for connecting tubulars of a wellsiteNAT OILWELL VARCO LP·Filed 2013·Granted Aug 9, 2016·2 cites·24 claims
- 1964US9175541B2Blowout preventer seal assembly and method of using sameNAT OILWELL VARCO LP·Filed 2013·Granted Nov 3, 2015·2 cites·25 claims
- 2055USRE47771EBlowout preventer with locking ram assembly and method of using sameNAT OILWELL VARCO LP·Filed 2017·Granted Dec 17, 2019·0 cites·20 claims
- 2154US11614175B2Self-contained hydraulically controlled relief valvePREMIUM OILFIELD TECH LLC·Filed 2021·Granted Mar 28, 2023·0 cites·13 claims
- 2252US9506304B2Apparatus and method for connecting tubulars of a wellsiteNAT OILWELL VARCO LP·Filed 2013·Granted Nov 29, 2016·0 cites·30 claims
- 2329USD521537SDiamond-shaped face on diamond-shaped face on blowout preventers, valves, chokes, or the likeT 3 PROPERTY HOLDINGS INC·Filed 2004·Granted May 23, 2006·3 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →