Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8130591 | Downhole measurements of mud acoustic velocity | — | 2012-03-06 |
| 8107316 | Controlled source imbalance apparatus, systems, and methods | James R. Birchak | 2012-01-31 |
| 8055448 | Imaging of formation structure ahead of the drill-bit | Holger Mathiszik, Thomas Bohlen, Denise De Nil, Daniel Köhn, Olaf Hellwig +1 more | 2011-11-08 |
| 7318471 | System and method for monitoring and removing blockage in a downhole oil and gas recovery operation | Paul F. Rodney, Jeroen Groenenboom, Wei Han, James R. Birchak, Denis P. Schmitt +1 more | 2008-01-15 |