Roger D. Hegdahl

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Crosby, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Gas lift mandrel
- Patent number 6,810,955
- Issue date Nov 2, 2004
- Baker Hughes Incorporated
- Brian A. Roth
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC

Patents Applicationslast 30 patents

Information Patent Application
Gas lift mandrel
- Publication number 20040035575
- Publication date Feb 26, 2004
- Brian A. Roth
- E21 - EARTH DRILLING MINING