Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11649908 | Valve lockout | — | 2023-05-16 |
| 10400897 | Orbital seat in a butterfly valve | Craig Geyer | 2019-09-03 |
| 8161996 | Resilient seated butterfly valve with interchangeable off-center and on-center discs | James E. Barker, Albert W. Libke | 2012-04-24 |
| 6808056 | Stop apparatus and method for gear actuators | James E. Barker | 2004-10-26 |
| 6257273 | Adjustable lockout device for knife gate valves | — | 2001-07-10 |
| 6044860 | Adjustable lockout device for knife gate valves | — | 2000-04-04 |
| 6045121 | Bi-directional valve seal mechanism | James E. Barker, LaVern Allen Lawrence | 2000-04-04 |
| 5865422 | Bi-directional valve seal mechanism | James E. Barker, LaVern Allen Lawrence | 1999-02-02 |