Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6918452 | Drill string shutoff valve | Kwong-Onn Chan, Loren P. Boisvert | 2005-07-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6918452 | Drill string shutoff valve | Kwong-Onn Chan, Loren P. Boisvert | 2005-07-19 |