Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6478107 | Axially extended downhole seismic source | James R. Birchak, Robert L. Malloy, Carl A. Robbins, David J. Young | 2002-11-12 |
| 6354146 | Acoustic transducer system for monitoring well production | James R. Birchak, Robert A. Moore, John P. Rogers | 2002-03-12 |