Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1084814 | Knife sharpener | — | 2025-07-22 |
| 11649720 | Integrated downhole system with plural telemetry subsystems | Aaron W. Logan, David A. Switzer, Jili Liu, Justin C. Logan | 2023-05-16 |
| 11359483 | Integrated downhole system with plural telemetry subsystems | Aaron W. Logan, David A. Switzer, Jili Liu, Justin C. Logan | 2022-06-14 |
| 11073015 | Integrated downhole system with plural telemetry subsystems | Aaron W. Logan, David A. Switzer, Jili Liu, Justin C. Logan | 2021-07-27 |
| 10731459 | Integrated downhole system with plural telemetry subsystems | Aaron W. Logan, David A. Switzer, Jili Liu, Justin C. Logan | 2020-08-04 |
| 10443374 | Electromagnetic communications system and method for a drilling operation | David A. Switzer, Jili Liu, Mojtaba Kazemi Miraki, Aaron W. Logan | 2019-10-15 |
| 10253621 | Integrated downhole system with plural telemetry subsystems | Aaron W. Logan, David A. Switzer, Jili Liu, Justin C. Logan | 2019-04-09 |
| 10233747 | Optimizing electromagnetic telemetry transmissions | Jili Liu, Aaron W. Logan, David A. Switzer, Monica E. Varga, Mojtaba Kazemi Miraki | 2019-03-19 |
| 10215021 | Downhole electromagnetic and mud pulse telemetry apparatus | David A. Switzer, Jili Liu, Aaron W. Logan | 2019-02-26 |
| 10202844 | 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 | 2019-02-12 |
| 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 |
| 9771792 | Method and apparatus for multi-channel downhole electromagnetic telemetry | Jili Liu, David A. Switzer, Aaron W. Logan | 2017-09-26 |
| 9765615 | Optimizing electromagnetic telemetry transmissions | Jili Liu, Aaron W. Logan, David A. Switzer, Monica E. Varga, Mojtaba Kazemi Miraki | 2017-09-19 |
| 9752429 | Downhole electromagnetic and mud pulse telemetry apparatus | David A. Switzer, Jili Liu, Aaron W. Logan | 2017-09-05 |
| 9719345 | Electromagnetic communications system and method for a drilling operation | David A. Switzer, Jili Liu, Mojtaba Kazemi Miraki, Aaron W. Logan | 2017-08-01 |
| 9664038 | 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 | 2017-05-30 |
| 9605535 | Integrated downhole system with plural telemetry subsystems | Aaron W. Logan, David A. Switzer, Jili Liu, Justin C. Logan | 2017-03-28 |
| 9574441 | Downhole telemetry signal modulation using pressure pulses of multiple pulse heights | Jili Liu, David A. Switzer, Aaron W. Logan | 2017-02-21 |
| 9435196 | Downhole electromagnetic and mud pulse telemetry apparatus | David A. Switzer, Jili Liu, Aaron W. Logan | 2016-09-06 |
| 9291049 | Downhole electromagnetic and mud pulse telemetry apparatus | David A. Switzer, Jili Liu, Aaron W. Logan | 2016-03-22 |