Issued Patents 2002
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6470979 | Sonde housing structure | Robert F. Crane | 2002-10-29 |
| 6450269 | Method and bit for directional horizontal boring | Robert F. Crane | 2002-09-17 |
| 6439319 | Method and apparatus for directional boring under mixed conditions | Robert F. Crane, Randy R. Runquist, Mark Van Houwelingen | 2002-08-27 |
| 6422782 | Apparatus for mounting an electronic device for use in directional drilling | — | 2002-07-23 |
| 6390207 | Method and apparatus for directional boring under mixed conditions | Robert F. Crane, Randy R. Runquist, Mark Van Houwelingen | 2002-05-21 |
| 6390087 | Drill bit for directional drilling | Robert F. Crane | 2002-05-21 |
| 6371223 | Drill head for directional boring | Robert F. Crane | 2002-04-16 |