Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10590740 | Modified downhole isolation tool having a seating means and ported sliding sleeve | Gregg Lacusta | 2020-03-17 |
| 8899316 | Downhole isolation tool having a ported sliding sleeve | Gregg Lacusta | 2014-12-02 |
| 8893776 | Downhole ported shifting sleeve | Gregg Lacusta | 2014-11-25 |
| 7543652 | Subsurface annular safety barrier | Dwayne Leismer, Youel Hilsman | 2009-06-09 |
| 7140447 | Subsurface annular safety barrier | Dwayne Leismer, Youel Hilsman | 2006-11-28 |