John L. McCoy JR.

Follow

Person

Broken Arrow, OK, US

People

Patents Grantslast 30 patents

Information Patent Grant
Flapper lock open apparatus
- Patent number 6,684,958
- Issue date Feb 3, 2004
- Baker Hughes Incorporated
- Ronald D. Williams
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Flapper lock open apparatus
- Publication number 20030192703
- Publication date Oct 16, 2003
- Ronald D. Williams
- E21 - EARTH DRILLING MINING