Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678643 | Acoustic logging while drilling tool to determine bed boundaries | A. J. Mallett, John W. Minear, Batakrishna Mandal, James R. Birchak, Eugene J. Linyaev | 1997-10-21 |
| 5644186 | Acoustic Transducer for LWD tool | James R. Birchak, Eugene J. Linyaev, Dennis Roessler | 1997-07-01 |