Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |