Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7222668 | Sample extraction system for boreholes | Douglas J. Belshaw, Jamieson Edward Champ | 2007-05-29 |
| 6581682 | Expandable borehole packer | John Howard Parent, Jamieson Edward Champ | 2003-06-24 |