Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8720855 | Ball valve having multiple moveable seats | — | 2014-05-13 |
| 8646752 | Ball valve having multiple moveable seats | — | 2014-02-11 |
| 8201574 | Bi-directional sealing ball valve | — | 2012-06-19 |
| 6240946 | Switch valve | — | 2001-06-05 |
| 5313976 | Top entry ball valve and method of assembly | — | 1994-05-24 |
| 5269347 | Fluid pressure isolator apparatus | — | 1993-12-14 |
| 5139229 | Ball valve and method of assembly | — | 1992-08-18 |
| 5097635 | Method and apparatus for automatic ball to seat lapping | — | 1992-03-24 |