Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6394187 | Flapper valve assembly apparatus and method | Michael V. Vinzant, Paul Butler | 2002-05-28 |
| 6352118 | System and method for communication hydraulic control to a wireline retrievable downhole device | Dennis Kaminski | 2002-03-05 |