Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886241 | Valve stem packing containment for high pressure, high temperature | Robert T. Wilson | 1989-12-12 |
| 4834338 | High pressure flexible seat valve trim | — | 1989-05-30 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886241 | Valve stem packing containment for high pressure, high temperature | Robert T. Wilson | 1989-12-12 |
| 4834338 | High pressure flexible seat valve trim | — | 1989-05-30 |