Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6787505 | Electrically conductive non-aqueous wellbore fluids | Geoffrey Maitland, Christopher Alan Sawdon | 2004-09-07 |
| 6770603 | Electrically conductive non-aqueous wellbore fluids | Christopher Alan Sawdon, Paul Ryan Craddock, Anthony Lawson | 2004-08-03 |