Issued Patents All Time
Showing 51–66 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5070944 | Down hole electrically operated safety valve | — | 1991-12-10 |
| 5040606 | Annulus safety valve | — | 1991-08-20 |
| 5007852 | Electrical cable assembly | Alan J. Dean | 1991-04-16 |
| 5005650 | Multi-purpose well head equipment | — | 1991-04-09 |
| 5002129 | Removable guide post | — | 1991-03-26 |
| 4943187 | ROV intervention on subsea equipment | — | 1990-07-24 |
| 4920811 | Fail-safe release actuator mechanism | — | 1990-05-01 |
| 4903774 | Annulus shut-off mechanism | Christopher E. Dykes, Peter W. Francis | 1990-02-27 |
| 4900433 | Vertical oil separator | Alan J. Dean | 1990-02-13 |
| 4850743 | Template levelling device | — | 1989-07-25 |
| 4848472 | Insert choke and control module therefor | — | 1989-07-18 |
| 4848475 | Sea bed process complex | Alan J. Dean | 1989-07-18 |
| 4806114 | Underwater electrically conductive coupling | — | 1989-02-21 |
| 4732215 | Subsea oil production system | — | 1988-03-22 |
| 4684291 | Template levelling device | — | 1987-08-04 |
| 4567762 | Thermoelectric level detector and a method for its manufacture | Dieter Busch, Fritz Sondermann, Fritz Stork | 1986-02-04 |