Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5320180 | Dual antenna radio frequency locating apparatus and method | David A. Ruley | 1994-06-14 |
| 5294923 | Method and apparatus for relaying downhole data to the surface | Rainer Juergens, Leslie T. SHALE | 1994-03-15 |