Jan Edgar Marshall

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Conroe, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Matrix fixed cutter drill bits and methods for manufacturing same
- Patent number 9,631,435
- Issue date Apr 25, 2017
- National Oilwell DHT, L.P.
- Michael Garner
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reinforced stators and fabrication methods
- Patent number 9,309,767
- Issue date Apr 12, 2016
- National-Oilwell Varco, L.P.
- Harold A. Sreshta
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
MATRIX FIXED CUTTER DRILL BITS AND METHODS FOR MANUFACTURING SAME
- Publication number 20150159440
- Publication date Jun 11, 2015
- National Oilwell DHT, L.P.
- Michael Garner
- E21 - EARTH DRILLING MINING
Information Patent Application
Reinforced Stators and Fabrication Methods
- Publication number 20130149182
- Publication date Jun 13, 2013
- National-Oilwell Varco, L.P.
- Harold A. Sreshta
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...