David Earl Barker

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Hockley, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Drilling motor interior valve
- Patent number 11,248,418
- Issue date Feb 15, 2022
- Bico Drilling Tools, Inc.
- David Barker
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DRILLING MOTOR INTERIOR VALVE
- Publication number 20200347677
- Publication date Nov 5, 2020
- Bico Drilling Tools, Inc.
- David Barker
- E21 - EARTH DRILLING MINING
Information Patent Application
DRILLING MOTOR INTERIOR VALVE
- Publication number 20190040697
- Publication date Feb 7, 2019
- Bico Drilling Tools, Inc.
- David Barker
- E21 - EARTH DRILLING MINING
Information Patent Application
METHOD AND APPARATUS FOR CONTROLLING EROSION IN A DOWNHOLE TOOL
- Publication number 20140262339
- Publication date Sep 18, 2014
- Kenneth Michael Nero
- E21 - EARTH DRILLING MINING