Feld; Dagobert
Patent Applications and Registrations
Patent applications and USPTO patent grants for Feld; Dagobert.The latest application filed is for "saver sub for a steering tool".
- Feld; Dagobert - Lachendorf DE
- Feld; Dagobert - Hanover DE
| Patent | Date |
|---|---|
| Saver sub for a steering tool Grant 6,845,826 - Feld , et al. January 25, 2 | 2005-01-25 |
| Drilling tool for sinking wells in underground rock formations Grant 5,168,941 - Krueger , et al. December 8, 1 | 1992-12-08 |
| Directional drilling tool apparatus and method Grant 5,156,222 - Jurgens , et al. October 20, 1 | 1992-10-20 |
| Double guided mud pulse valve Grant 5,040,155 - Feld August 13, 1 | 1991-08-13 |
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