Shumard; Dennis D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Shumard; Dennis D..The latest application filed is for "concentric pipe joint restraint".
- Shumard; Dennis D. - Eastland TX
| Patent | Date |
|---|---|
| Concentric pipe joint restraint Grant 6,786,517 - Shumard September 7, 2 | 2004-09-07 |
| Concentric pipe joint restraint App 20030085573 - Shumard, Dennis D. | 2003-05-08 |
| Joint restraint Grant 6,173,993 - Shumard , et al. January 16, 2 | 2001-01-16 |
| Wedge assembly restraint Grant 5,544,922 - Shumard , et al. August 13, 1 | 1996-08-13 |
| Segmented pipe joint retainer glands Grant 4,896,903 - Shumard January 30, 1 | 1990-01-30 |
| Segmented pipe joint retainer glands Grant 4,779,900 - Shumard October 25, 1 | 1988-10-25 |
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