Issued Patents 2018
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10107090 | Advanced underground homing system, apparatus and method | John E. Mercer, Albert W. Chau | 2018-10-23 |
| 10107091 | Flux plane locating in an underground drilling system | Albert W. Chau, John E. Mercer | 2018-10-23 |
| 10094946 | Transmitter using a planar loop antenna for generating a locating signal | John E. Mercer, Albert W. Chau, Rudolf Zeller | 2018-10-09 |
| 9915747 | Inground transmitter with roll orientation pattern based frequency change | John E. Mercer | 2018-03-13 |