Issued Patents 2011
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8080998 | Distinguishing false signals in cable locating using a reference signal | John E. Mercer | 2011-12-20 |
| 8042407 | Tension monitoring arrangement and method | Rudolf Zeller, John E. Mercer, Charles Yu Yat Tsang | 2011-10-25 |
| 7990152 | Locating arrangement and method using boring tool and cable locating signals | Guenter W. Brune, John E. Mercer | 2011-08-02 |
| 7960973 | Tracking positions of personnel, vehicles, and inanimate objects | Rudolf Zeller, Guenter W. Brune, John E. Mercer | 2011-06-14 |
| 7956614 | Flux plane locating in an underground drilling system | Guenter W. Brune, John E. Mercer | 2011-06-07 |
| 7898494 | Locating technique and apparatus using an approximated dipole signal | Guenter W. Brune, John E. Mercer, Rudolf Zeller | 2011-03-01 |
| 7888939 | Tracking the positional relationship between a boring tool and one or more buried lines using a composite magnetic signal | John E. Mercer | 2011-02-15 |
| 7884610 | Distinguishing false signals in cable locating | John E. Mercer | 2011-02-08 |