Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861986 | Tracer injection method | — | 1989-08-29 |
| 4825071 | Gamma ray borehole logging method and apparatus having compensation for borehole attenuation effects | Larry L. Gadeken | 1989-04-25 |