Duke; John A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Duke; John A..The latest application filed is for "wellbore window milling method".
- Duke; John A. - Baytown TX
- Duke; John A. - Stockbridge GA
| Patent | Date |
|---|---|
| Wellbore window milling method Grant 5,769,166 - Duke June 23, 1 | 1998-06-23 |
| Earth boring head Grant 4,384,624 - Duke , et al. May 24, 1 | 1983-05-24 |
| Hydraulic earth boring machine Grant 4,306,626 - Duke , et al. December 22, 1 | 1981-12-22 |
| Well cementing method and apparatus Grant 4,164,980 - Duke August 21, 1 | 1979-08-21 |
| Well cementing method and apparatus Grant 4,047,566 - Duke September 13, 1 | 1977-09-13 |
| Well conduit cementing adapter tool Grant 3,926,253 - Duke December 16, 1 | 1975-12-16 |
| SEC | 0001113333 | DUKE JOHN A |
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