| 8919430 |
Blowout container |
— |
2014-12-30 |
| 8844617 |
Annular blowout container (ABOC) |
— |
2014-09-30 |
| 7318580 |
Vehicle for materials handling and other industrial uses |
Ronald A Johnston, Nelson L. Stoldt, Paul K. Schufeldt, Peter J. Bradley |
2008-01-15 |
| 7201244 |
Vehicle for materials handling and other industrial uses |
Ronald A Johnston, Nelson L. Stoldt, Paul K. Schufeldt, Peter J. Bradley |
2007-04-10 |
| 5727631 |
Coiled tubing hanger |
James C. Baker |
1998-03-17 |
| 5490565 |
Casing seal and spool for use in fracturing wells |
— |
1996-02-13 |
| 5461778 |
Gate valve |
— |
1995-10-31 |
| 5456320 |
Casing seal and spool for use in fracturing wells |
— |
1995-10-10 |
| 5377955 |
Gate valve |
— |
1995-01-03 |
| D352094 |
Gate valve |
— |
1994-11-01 |
| 5351775 |
Method for propelling and retarding off-road haulers |
Ronald A Johnston, Gary L. Nelson |
1994-10-04 |
| 5211373 |
Gate valve having expanding gate and floating seats |
— |
1993-05-18 |
| 5143348 |
Easy-opening, high pressure gate valve |
James C. Baker, Randall; King, Elton W. Eads |
1992-09-01 |
| 5103923 |
Method and apparatus for propelling and retarding off-road haulers |
Ronald A Johnston, Gary L. Nelson |
1992-04-14 |
| 4981186 |
Truck load weighing method and apparatus |
Glenn A. Shankle, Richard D. Baney, Paul L. Kelsey, Erwin F. Stoldt |
1991-01-01 |