Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7225827 | Insertion valve and installation method | Jeffrey L. Maichel | 2007-06-05 |
| 7021325 | Valve assembly and method for hot tapping a line | Jeffrey L. Maichel | 2006-04-04 |
| 6983759 | Valve and method for repairing a valve under pressure | Jeffrey L. Maichel | 2006-01-10 |
| 6776184 | Insertion valve and installation method | Jeffrey L. Maichel | 2004-08-17 |