Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9829141 | Linestops, nozzles and completion plugs for installation in pressurized pipes | Christopher C. Vazzana, Carl Mastny, Stephen Roehrig | 2017-11-28 |
| 9644779 | Gate valves for installation in pressurized pipes | Christopher C. Vazzana, Carl Mastny, Stephen Roehrig | 2017-05-09 |