Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6557629 | Wellhead isolation tool | Henry Wong, George E. Guthrie, Christopher P. Egan | 2003-05-06 | $3,928,000 |
| 4848777 | Pressure energized/pressure intensified casing seal | David Zollo, David Cain, Phillip F. Huang, Brenda K. Montemayor, Ray V. MYERS +3 more | 1989-07-18 | $7,851,000 |