Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6927741 | Locating technique and apparatus using an approximated dipole signal | Guenter W. Brune, John E. Mercer, Albert W. Chau | 2005-08-09 |
| 6920943 | Mapping tool for tracking and/or guiding an underground boring tool | John E. Mercer, Peter H. Hambling, Shiu S. Ng, Guenter W. Brune, Lloyd A. Moore | 2005-07-26 |
| 6903560 | Orientation sensor especially suitable for use in an underground boring device | John E. Mercer | 2005-06-07 |