John L. Tillman Jr.

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The Woodlands, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Field installable rod guide and method
- Patent number 5,873,157
- Issue date Feb 23, 1999
- Flow Control Equipment Co.
- Charles M. Hart
- E21 - EARTH DRILLING MINING
Information Patent Grant
Field installable rod guide and method
- Patent number 5,339,896
- Issue date Aug 23, 1994
- J. M. Huber Corp.
- Charles M. Hart
- E21 - EARTH DRILLING MINING