Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4551823 | Method and apparatus for acoustic cement bond logging | Jerry H. Carmichael | 1985-11-05 |
| 4472680 | Circuit for processing electrical signals generated by a casing collar indicator instrument | — | 1984-09-18 |