Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878180 | Method of evaluating the condition of tubular goods | James Edward Pickett, Norman R. Carlson | 1989-10-31 |
| 4825072 | Method and apparatus for determining well fluid flow velocity using a nonradioactive tracer | Donald W. Oliver, David P. Hollingsworth | 1989-04-25 |