Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673751 | System for controlling the flow of fluid in an oil well | Philip Head, Paul Wilmott | 1997-10-07 |
| 5404945 | Device for controlling the flow of fluid in an oil well | Philip Head, Paul Wilmott | 1995-04-11 |
| 5062481 | Control of `U` tubing in the flow of cement in oil well casings | — | 1991-11-05 |