Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10718458 | Automated pressure equalization above and below completion plug of gate valve cartridge or a completion plug of a line stop fitting | Andrew J. Nelson, Christopher C. Vazzana, Cole Strickland | 2020-07-21 |
| 10619747 | Expanding gate valve assembly with pressure equalization system | Christopher C. Vazzana, Andrew J. Nelson | 2020-04-14 |
| 10473560 | Pipe core sampling and tapping apparatus | Andrew J. Nelson, Christopher C. Vazzana | 2019-11-12 |
| 9829141 | Linestops, nozzles and completion plugs for installation in pressurized pipes | Christopher C. Vazzana, Stephen Roehrig, Panagiotis Tsafaras | 2017-11-28 |
| 9644779 | Gate valves for installation in pressurized pipes | Christopher C. Vazzana, Stephen Roehrig, Panagiotis Tsafaras | 2017-05-09 |