Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5199489 | Method of cementing well casing to avoid gas channelling from shallow gas-bearing formations | Les Johnson, Brian Sissons | 1993-04-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5199489 | Method of cementing well casing to avoid gas channelling from shallow gas-bearing formations | Les Johnson, Brian Sissons | 1993-04-06 |