Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5240076 | Casing tension retainer | Stephen A. Cromar, Garry Stephen, Norman Brammer, Ian Calder | 1993-08-31 |
| 5002131 | Casing tensioning mechanism for a casing hanger | Stephen A. Cromar, Garry Stephen | 1991-03-26 |