Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9091382 | Machine-actuated and removable safety closure with anti-rotation and machine-released holder | Brian Michael GRESH | 2015-07-28 |
| 8001988 | Verifiable closing and locking system of a cylindrical passageway | Randy B. Billington, Bruce W. Bingham, Tony R. Garrison, Mark Morgan | 2011-08-23 |
| 7270139 | Cam-assisted, wedge actuated, metal-to-metal seal, block and bleed plugging tool | Charles D. Calkins, Harvey A. Ugland | 2007-09-18 |
| 6116285 | Removable threaded plug | — | 2000-09-12 |
| 5531250 | Device for plugging the interior of a pipe | Eric N. Freeman, David Blevins, Gene R. Ralls, Bill D. Andrew, Coy D. Osburn | 1996-07-02 |
| 4693278 | Safety closure member | Coy D. Osborn | 1987-09-15 |