Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6378610 | Communicating with devices positioned outside a liner in a wellbore | Michael Robert Johnson, Ronald E. Pringle, John A. Booker, Alexandre Kosmala | 2002-04-30 |
| 6302203 | Apparatus and method for communicating with devices positioned outside a liner in a wellbore | Michael Robert Johnson, Ronald E. Pringle, John A. Booker | 2001-10-16 |