Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7665528 | Frangible flapper valve with hydraulic impact sleeve and method of breaking | Richard J. Ross | 2010-02-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7665528 | Frangible flapper valve with hydraulic impact sleeve and method of breaking | Richard J. Ross | 2010-02-23 |