Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7182151 | Apparatus and method for horizontal drilling | Christopher T. Allen | 2007-02-27 |
| 6886644 | Apparatus and method for horizontal drilling | Christopher T. Allen | 2005-05-03 |
| 6435286 | Apparatus and method for detecting a location and an orientation of an underground boring tool | Christopher T. Allen | 2002-08-20 |
| 6161630 | Apparatus and method for controlling an underground boring tool | Christopher T. Allen | 2000-12-19 |
| 5904210 | Apparatus and method for detecting a location and an orientation of an underground boring tool | Christopher T. Allen | 1999-05-18 |
| 5819859 | Apparatus and method for detecting an underground structure | Christopher T. Allen | 1998-10-13 |
| 5720354 | Trenchless underground boring system with boring tool location | Christopher T. Allen | 1998-02-24 |