Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855912 | Method and apparatus for measurement of the thermal behavior of porous media | Jayanth R. Banavar, David L. Johnson, Sidney Nagel | 1989-08-08 |
| 4839644 | System and method for communicating signals in a cased borehole having tubing | Roger W. McBride | 1989-06-13 |