| 12241571 |
Flexible hose end fitting assembly |
Justin Lane Poehls, David T. Figgs |
2025-03-04 |
| 11530591 |
Large bore plug valve |
Brian C. Witkowski, Duc Thanh Tran |
2022-12-20 |
| 11421504 |
Hydraulic fracturing system, apparatus, and method |
Brian C. Witkowski, Nadiya Fuller, Duc Thanh Tran, Peter Walter |
2022-08-23 |
| 11365819 |
Clapper valve |
Nadiya Fuller, Brian C. Witkowski |
2022-06-21 |
| 11149514 |
Hydraulic fracturing system, apparatus, and method |
Brian C. Witkowski, Nadiya Fuller, Duc Thanh Tran, Peter Walter |
2021-10-19 |
| 10808488 |
Hydraulic fracturing system, apparatus, and method |
Brian C. Witkowski, Nadiya Fuller, Duc Thanh Tran, Peter Walter |
2020-10-20 |
| 10753490 |
Clapper valve |
Nadiya Fuller, Brian C. Witkowski |
2020-08-25 |
| 10677365 |
Pressure relief valve assembly and methods |
— |
2020-06-09 |
| 10634260 |
Rupture disc with upper lip |
— |
2020-04-28 |
| 10526862 |
Hydraulic fracturing system, apparatus, and method |
Brian C. Witkowski, Nadiya Fuller, Duc Thanh Tran, Peter Walter |
2020-01-07 |
| 10197172 |
Clapper valve |
Nadiya Fuller, Brian C. Witkowski |
2019-02-05 |
| 9638337 |
Plug valve having preloaded seal segments |
Brian C. Witkowski |
2017-05-02 |
| 9103448 |
Plug valve having preloaded seal segments |
Brian C. Witkowski |
2015-08-11 |
| D734434 |
Seal assembly |
Brian C. Witkowski |
2015-07-14 |
| 8978695 |
Flowline flapper valve |
Brian C. Witkowski |
2015-03-17 |
| D707797 |
Seal segment |
Brian Wilkowski |
2014-06-24 |
| D707332 |
Seal assembly |
Brian C. Witkowski |
2014-06-17 |
| D703294 |
Seal side segment |
Brian C. Witkowski |
2014-04-22 |
| 8261771 |
Flowline flapper valve |
Brian C. Witkowski |
2012-09-11 |