Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848777 | Pressure energized/pressure intensified casing seal | David Zollo, Roy W. Benefield, David Cain, Phillip F. Huang, Brenda K. Montemayor +3 more | 1989-07-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848777 | Pressure energized/pressure intensified casing seal | David Zollo, Roy W. Benefield, David Cain, Phillip F. Huang, Brenda K. Montemayor +3 more | 1989-07-18 |