Issued Patents 2005
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6975119 | Boring tool tracking/guiding system and method with unconstrained target location geometry | John E. Mercer, Albert W. Chau | 2005-12-13 |
| 6963201 | Flux plane locating in an underground drilling system | Albert W. Chau, John E. Mercer | 2005-11-08 |
| 6927741 | Locating technique and apparatus using an approximated dipole signal | John E. Mercer, Albert W. Chau, Rudolf Zeller | 2005-08-09 |
| 6920943 | Mapping tool for tracking and/or guiding an underground boring tool | John E. Mercer, Peter H. Hambling, Rudolf Zeller, Shiu S. Ng, Lloyd A. Moore | 2005-07-26 |
| 6917202 | Boring tool tracking/guiding system and method with unconstrained target location geometry | John E. Mercer, Albert W. Chau | 2005-07-12 |
| 6868921 | Boring tool tracking fundamentally based on drill string length, pitch and roll | James W. Burrows, John E. Mercer | 2005-03-22 |
| 6856135 | Boring tool tracking/guiding system and method with unconstrained target location geometry | John E. Mercer, Albert W. Chau | 2005-02-15 |