Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5615740 | Internal pressure sleeve for use with easily drillable exit ports | Ian Gillis, Elis Vandenberg | 1997-04-01 |
| 5602541 | System for drilling deviated boreholes | Randal H. Pustanyk, Nicholas Peter Wallis | 1997-02-11 |