Issued Patents 2011
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8025109 | Method for establishing the positions of a transmitter and detector in a region | Peter H. Hambling, John E. Mercer, Lloyd A. Moore, Shiu S. Ng, Rudolf Zeller | 2011-09-27 |
| 7990150 | Multifrequency locating arrangement with frequency designation | John E. Mercer | 2011-08-02 |
| 7990152 | Locating arrangement and method using boring tool and cable locating signals | Albert W. Chau, John E. Mercer | 2011-08-02 |
| 7967080 | Boring tool tracking fundamentally based on drill string length, pitch and roll | James W. Burrows, John E. Mercer | 2011-06-28 |
| 7960973 | Tracking positions of personnel, vehicles, and inanimate objects | Rudolf Zeller, Albert W. Chau, John E. Mercer | 2011-06-14 |
| 7956614 | Flux plane locating in an underground drilling system | Albert W. Chau, John E. Mercer | 2011-06-07 |
| 7898494 | Locating technique and apparatus using an approximated dipole signal | John E. Mercer, Albert W. Chau, Rudolf Zeller | 2011-03-01 |