Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6470970 | Multiplier digital-hydraulic well control system and method | Dan Purkis, Richard P. Rubbo | 2002-10-29 |
| 6414905 | Method and apparatus for communicating coded messages in a wellbore | Steve C. Owens, David Rothers, Douglas J. Lehr, Michael W. Holcombe | 2002-07-02 |