Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9285039 | Sleeve seal assembly and rotary valve having sleeve seal assembly | Randall Scott Collison, Tonya Probasco | 2016-03-15 |
| 9182053 | Methods and apparatus to load a valve packing | Wilbur Dean Hutchens, Randall Scott Collison, David Charles Stanze | 2015-11-10 |
| 8733733 | Sleeve seal assembly and rotary valve having sleeve seal assembly | Randall Scott Collison, Tonya Probasco | 2014-05-27 |
| 8613423 | Methods and apparatus to load a valve packing | Wilbur Dean Hutchens, Randall Scott Collison, David Charles Stanze | 2013-12-24 |
| 5707041 | Fluid control valve with fastener for ceramic valve plug | Gary Alan Witt, David J. Westwater | 1998-01-13 |
| 5016857 | Control element for a ball valve | Larry J. Weber | 1991-05-21 |
| 4746772 | Adjustable position indicating apparatus | Larry L. Swartz | 1988-05-24 |