Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12393725 | Hygiene compliance data channel | Mitchell S. Butzer, Bret Thomas Stewart, Brett Harned, Darrell Lee Janke | 2025-08-19 |
| 12104490 | Directional drilling target steering apparatus and method | Bruce Kolpack, David Bahr, Thomas J. Hall | 2024-10-01 |
| 12055034 | Advanced inground operations, system and associated apparatus | Albert W. Chau, Craig Caswell | 2024-08-06 |
| 12000265 | Sonde with integral pressure sensor and method | Albert W. Chau, Dmitry Feldman | 2024-06-04 |
| 11867057 | Advanced inground device power control and associated methods | Albert W. Chau, Scott Phillips | 2024-01-09 |
| 11629554 | Directional drilling target steering apparatus and method | Bruce Kolpack, David Bahr, Thomas J. Hall | 2023-04-18 |
| 11598200 | Sonde with integral pressure sensor and method | Albert W. Chau, Dmitry Feldman | 2023-03-07 |
| 11408273 | Advanced inground operations, system and associated apparatus | Albert W. Chau, Craig Caswell | 2022-08-09 |
| 11339645 | Sonde with integral pressure sensor and method | Albert W. Chau, Dmitry Feldman | 2022-05-24 |
| 11136881 | Advanced inground operations, system, communications and associated apparatus | Albert W. Chau, Craig Caswell | 2021-10-05 |
| 11105161 | Drill string adapter and method for inground signal coupling | Albert W. Chau | 2021-08-31 |
| 11060355 | Directional drilling target steering apparatus and method | Bruce Kolpack, David Bahr, Thomas J. Hall | 2021-07-13 |
| 10781638 | Directional drilling target steering apparatus and method | Bruce Kolpack, David Bahr, Thomas J. Hall | 2020-09-22 |
| 10767468 | Sonde with integral pressure sensor and method | Albert W. Chau, Dmitry Feldman | 2020-09-08 |
| 10738592 | Advanced inground operations, system and associated apparatus | Albert W. Chau, Craig Caswell | 2020-08-11 |
| 10443316 | Drill string adapter and method for inground signal coupling | Albert W. Chau | 2019-10-15 |
| 10323506 | Sonde with integral pressure sensor and method | Albert W. Chau, Dmitry Feldman | 2019-06-18 |
| 10072489 | Advanced inground device power control and associated methods | Albert W. Chau, Scott Phillips | 2018-09-11 |
| 9664027 | Advanced inground operations, system and associated apparatus | Albert W. Chau, Craig Caswell | 2017-05-30 |
| 9617797 | Drill string adapter and method for inground signal coupling | Albert W. Chau | 2017-04-11 |
| 9540879 | Directional drilling target steering apparatus and method | Bruce Kolpack, David Bahr, Thomas J. Hall | 2017-01-10 |
| 9435193 | Sonde with integral pressure sensor and method | Albert W. Chau, Dmitry Feldman | 2016-09-06 |
| 9425619 | Advanced inground device power control and associated methods | Albert W. Chau, Scott Phillips | 2016-08-23 |
| 8695727 | Drill string adapter and method for inground signal coupling | Albert W. Chau | 2014-04-15 |
| 8662200 | Sonde with integral pressure sensor and method | Albert W. Chau, Dmitry Feldman | 2014-03-04 |