Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6601656 | Method and apparatus for drilling an offshore underwater well | Hans Paul Hopper | 2003-08-05 | $21,704,000 |
| 6431285 | Apparatus for drilling an offshore underwater well | Hans Paul Hopper | 2002-08-13 | $28,312,000 |
| 6231027 | High torque rotating actuator | Gerald S. Baker, Brian Hart, Danny K. Wolff | 2001-05-15 | $48,841,000 |
| 6093955 | Power semiconductor device | Koenraad Rutgers | 2000-07-25 | |
| 5992527 | Wellhead assembly | Brian Hart, Craig Duell | 1999-11-30 | $37,388,000 |
| 5838057 | Transistor switches | Michael J. Maytum | 1998-11-17 | $23,340,000 |
| 5035258 | Valve with removable insert | — | 1991-07-30 | $37,890,000 |