Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834209 | Transverse wave logger | Charles B. Vogel, James O. Guy, John R. Smith | 1989-05-30 |
| 4809237 | Method for monitoring the goodness of the cement bond to a borehole casing | Charles B. Vogel, James O. Guy, John R. Smith | 1989-02-28 |