Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888740 | Differential energy acoustic measurements of formation characteristic | Alain Brie, Richard A. Plumb | 1989-12-19 |
| 4870627 | Method and apparatus for detecting and evaluating borehole wall fractures | Alain Brie, Richard A. Plumb | 1989-09-26 |
| 4809236 | Method and apparatus for determining the magnitude of components of measurements made from inside a borehole | Ralphe Wiggins | 1989-02-28 |