Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4619283 | Stem seal for tapered lubricated plug valves | Donn W. Duffey | 1986-10-28 |
| 4234011 | Plug valve construction | Earl A. Bake | 1980-11-18 |
| 4216703 | Valve actuator | — | 1980-08-12 |