John M. Bednar

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Subsea tree cap well choke system
- Patent number 5,010,956
- Issue date Apr 30, 1991
- Exxon Production Research Company
- John M. Bednar
- E21 - EARTH DRILLING MINING
Information Patent Grant
Annular gas trap
- Patent number 4,615,387
- Issue date Oct 7, 1986
- Exxon Production Research Co.
- Dale V. Johnson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Acoustically controlled electro-mechanical circulation sub
- Patent number 4,373,582
- Issue date Feb 15, 1983
- Exxon Production Research Co.
- John M. Bednar
- E21 - EARTH DRILLING MINING
Information Patent Grant
Acoustically actuated downhole blowout preventer
- Patent number 4,367,794
- Issue date Jan 11, 1983
- Exxon Production Research Co.
- John M. Bednar
- E21 - EARTH DRILLING MINING
Information Patent Grant
Acoustic transmitter and method to produce essentially longitudinal...
- Patent number 4,314,365
- Issue date Feb 2, 1982
- Exxon Production Research Company
- Clifford W. Petersen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Riser tensioner system
- Patent number 4,272,059
- Issue date Jun 9, 1981
- Exxon Production Research Company
- Jere A. Noerager
- E21 - EARTH DRILLING MINING