Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857852 | Induction well logging apparatus with transformer coupled phase sensitive detector | Robert L. Kleinberg, Brian Clark, David Mariani | 1989-08-15 |
| 4851781 | Method and apparatus for investigating a borehole using an array of elements | Thomas L. Marzetta | 1989-07-25 |
| 4845433 | Apparatus for microinductive investigation of earth formations | Robert L. Kleinberg, Donald G. Dudley, Brian Clark | 1989-07-04 |