John C. Holden

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Duncan, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Wellbore circulating valve
- Patent number 4,058,165
- Issue date Nov 15, 1977
- Halliburton Company
- John C. Holden
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus for testing oil wells
- Patent number 3,964,305
- Issue date Jun 22, 1976
- Halliburton Company
- Gary Q. Wray
- E21 - EARTH DRILLING MINING
Information Patent Grant
Wellbore circulating valve
- Patent number 3,930,540
- Issue date Jan 6, 1976
- Halliburton Company
- John C. Holden
- E21 - EARTH DRILLING MINING