John Johnson

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Richmond, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Diverter plugs for use in well bores and associated methods of use
- Patent number 7,350,578
- Issue date Apr 1, 2008
- Halliburton Energy Services, Inc.
- David D. Szarka
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Diverter plugs for use in well bores and associated methods of use
- Publication number 20070095538
- Publication date May 3, 2007
- David D. Szarka
- E21 - EARTH DRILLING MINING