Issued Patents 2018
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10066481 | Downhole electromagnetic and mud pulse telemetry apparatus | David A. Switzer, Jili Liu, Aaron W. Logan | 2018-09-04 |
| 9995134 | Electromagnetic pulse downhole telemetry | Jili Liu, Aaron W. Logan, David A. Switzer | 2018-06-12 |
| 9988896 | Method and system for transmitting a data frame of an electromagnetic telemetry signal to or from a downhole location | David A. Switzer, Jili Liu, Aaron W. Logan | 2018-06-05 |
| 9988897 | Optimizing electromagnetic telemetry transmissions | Jili Liu, Aaron W. Logan, David A. Switzer, Monica E. Varga, Mojtaba Kazemi Miraki | 2018-06-05 |
| 9903198 | Downhole electromagnetic and mud pulse telemetry apparatus | David A. Switzer, Jili Liu, Aaron W. Logan | 2018-02-27 |