Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9279529 | Breakaway thread-lock quick connect/disconnect coupling | Geoffrey R. Zhang, Tim Carmody, Siavosh S. Kakavand | 2016-03-08 |
| 8480133 | Pressure balanced transfer tube assembly with first and second inner housings that move telescopically | Geoffrey R. Zhang | 2013-07-09 |
| 7717473 | Dual walled transfer tube | Geoffrey R. Zhang | 2010-05-18 |
| 5123447 | Quick disconnect coupling | John H. Calvin, Jack Y. Wakasa | 1992-06-23 |
| 4653589 | Mudline casing hanger tieback adaptor with adjustable load ring | — | 1987-03-31 |
| 4653778 | Lockdown connector for mudline wellhead tieback adaptor | — | 1987-03-31 |