Gledhill; Andrew D
Patent Applications and Registrations
Patent applications and USPTO patent grants for Gledhill; Andrew D.The latest application filed is for "combined control valve and coupler".
- Gledhill; Andrew D - Stonehaven N/A GB
- Gledhill; Andrew D. - Stonehaven GB
- Gledhill; Andrew D. - Scotland GB
| Patent | Date |
|---|---|
| Hydraulic valves with integral seals Grant 8,813,786 - Tibbitts , et al. August 26, 2 | 2014-08-26 |
| Combined control valve and coupler Grant 8,430,125 - Massie , et al. April 30, 2 | 2013-04-30 |
| Electrically operated hydraulic valve Grant 8,210,208 - Tibbitts , et al. July 3, 2 | 2012-07-03 |
| Combined Control Valve And Coupler App 20110175003 - Massie; Andrew E. ; et al. | 2011-07-21 |
| Electrically Operated Hydraulic Valve App 20100065766 - Tibbitts; Matthew H. ; et al. | 2010-03-18 |
| Pressure activated release member for an expandable drillbit Grant 7,131,504 - Odell, II , et al. November 7, 2 | 2006-11-07 |
| Pressure activated release member for an expandable drillbit App 20060048972 - Odell; Albert C. II ; et al. | 2006-03-09 |
| Expandable bit with secondary release device Grant 6,953,096 - Gledhill , et al. October 11, 2 | 2005-10-11 |
| Expandable bit with a secondary release device App 20040124011 - Gledhill, Andrew D. ; et al. | 2004-07-01 |
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